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Finding the Fourth Proportional to 660,376.10, 990,564.15 and 424,180.10

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Solution

The fourth proportional to 660,376.10, 990,564.15 and 424,180.10 is: 636,270.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,376.10 : 990,564.15 = 424,180.10 : x
  2. Step 2: Convert to fraction form
    660,376.10/990,564.15 = 424,180.10/x
  3. Step 3: Cross multiply
    660,376.10x = 990,564.15 × 424,180.10
  4. Step 4: Simplify right side
    660,376.10x = 420,177,600,203.42
  5. Step 5: Solve for x
    x = 420,177,600,203.42/660,376.10
  6. Step 6: Final answer
    x = 636,270.15

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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.