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Finding the Fourth Proportional to 659,612.20, 989,807.10 and 435,620.20

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Solution

The fourth proportional to 659,612.20, 989,807.10 and 435,620.20 is: 653,687.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,612.20 : 989,807.10 = 435,620.20 : x
  2. Step 2: Convert to fraction form
    659,612.20/989,807.10 = 435,620.20/x
  3. Step 3: Cross multiply
    659,612.20x = 989,807.10 × 435,620.20
  4. Step 4: Simplify right side
    659,612.20x = 431,179,966,863.42
  5. Step 5: Solve for x
    x = 431,179,966,863.42/659,612.20
  6. Step 6: Final answer
    x = 653,687.07

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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.