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Finding the Fourth Proportional to 661,130.10, 991,695.15 and 424,934.10

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Solution

The fourth proportional to 661,130.10, 991,695.15 and 424,934.10 is: 637,401.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,130.10 : 991,695.15 = 424,934.10 : x
  2. Step 2: Convert to fraction form
    661,130.10/991,695.15 = 424,934.10/x
  3. Step 3: Cross multiply
    661,130.10x = 991,695.15 × 424,934.10
  4. Step 4: Simplify right side
    661,130.10x = 421,405,086,039.62
  5. Step 5: Solve for x
    x = 421,405,086,039.62/661,130.10
  6. Step 6: Final answer
    x = 637,401.15

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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.