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Finding the Fourth Proportional to 607,890.30, 911,835.45 and 489,792.30

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Solution

The fourth proportional to 607,890.30, 911,835.45 and 489,792.30 is: 734,688.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,890.30 : 911,835.45 = 489,792.30 : x
  2. Step 2: Convert to fraction form
    607,890.30/911,835.45 = 489,792.30/x
  3. Step 3: Cross multiply
    607,890.30x = 911,835.45 × 489,792.30
  4. Step 4: Simplify right side
    607,890.30x = 446,609,982,277.04
  5. Step 5: Solve for x
    x = 446,609,982,277.04/607,890.30
  6. Step 6: Final answer
    x = 734,688.45

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Half scale
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Double scale
Find fourth proportional to 607,891.30, 911,836.95 and 489,793.30
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.