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Finding the Fourth Proportional to 391,062.58, 539,387.57 and 358,900.86

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Solution

The fourth proportional to 391,062.58, 539,387.57 and 358,900.86 is: 495,027.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,062.58 : 539,387.57 = 358,900.86 : x
  2. Step 2: Convert to fraction form
    391,062.58/539,387.57 = 358,900.86/x
  3. Step 3: Cross multiply
    391,062.58x = 539,387.57 × 358,900.86
  4. Step 4: Simplify right side
    391,062.58x = 193,586,665,666.27
  5. Step 5: Solve for x
    x = 193,586,665,666.27/391,062.58
  6. Step 6: Final answer
    x = 495,027.34

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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.