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Finding the Fourth Proportional to 607,430.30, 911,145.45 and 489,332.30

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Solution

The fourth proportional to 607,430.30, 911,145.45 and 489,332.30 is: 733,998.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,430.30 : 911,145.45 = 489,332.30 : x
  2. Step 2: Convert to fraction form
    607,430.30/911,145.45 = 489,332.30/x
  3. Step 3: Cross multiply
    607,430.30x = 911,145.45 × 489,332.30
  4. Step 4: Simplify right side
    607,430.30x = 445,852,898,683.04
  5. Step 5: Solve for x
    x = 445,852,898,683.04/607,430.30
  6. Step 6: Final answer
    x = 733,998.45

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Half scale
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Double scale
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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.