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Finding the Fourth Proportional to 687,062.52, 948,146.58 and 418,790.52

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Solution

The fourth proportional to 687,062.52, 948,146.58 and 418,790.52 is: 577,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,062.52 : 948,146.58 = 418,790.52 : x
  2. Step 2: Convert to fraction form
    687,062.52/948,146.58 = 418,790.52/x
  3. Step 3: Cross multiply
    687,062.52x = 948,146.58 × 418,790.52
  4. Step 4: Simplify right side
    687,062.52x = 397,074,799,274.42
  5. Step 5: Solve for x
    x = 397,074,799,274.42/687,062.52
  6. Step 6: Final answer
    x = 577,931.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.