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Finding the Fourth Proportional to 607,415.80, 911,123.70 and 489,317.80

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Solution

The fourth proportional to 607,415.80, 911,123.70 and 489,317.80 is: 733,976.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,415.80 : 911,123.70 = 489,317.80 : x
  2. Step 2: Convert to fraction form
    607,415.80/911,123.70 = 489,317.80/x
  3. Step 3: Cross multiply
    607,415.80x = 911,123.70 × 489,317.80
  4. Step 4: Simplify right side
    607,415.80x = 445,829,044,411.86
  5. Step 5: Solve for x
    x = 445,829,044,411.86/607,415.80
  6. Step 6: Final answer
    x = 733,976.70

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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.