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Finding the Fourth Proportional to 607,998.80, 911,998.20 and 513,520.40

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Solution

The fourth proportional to 607,998.80, 911,998.20 and 513,520.40 is: 770,280.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,998.80 : 911,998.20 = 513,520.40 : x
  2. Step 2: Convert to fraction form
    607,998.80/911,998.20 = 513,520.40/x
  3. Step 3: Cross multiply
    607,998.80x = 911,998.20 × 513,520.40
  4. Step 4: Simplify right side
    607,998.80x = 468,329,680,463.28
  5. Step 5: Solve for x
    x = 468,329,680,463.28/607,998.80
  6. Step 6: Final answer
    x = 770,280.60

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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.