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Finding the Fourth Proportional to 391,488.92, 540,245.52 and 230,354.40

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Solution

The fourth proportional to 391,488.92, 540,245.52 and 230,354.40 is: 317,883.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,488.92 : 540,245.52 = 230,354.40 : x
  2. Step 2: Convert to fraction form
    391,488.92/540,245.52 = 230,354.40/x
  3. Step 3: Cross multiply
    391,488.92x = 540,245.52 × 230,354.40
  4. Step 4: Simplify right side
    391,488.92x = 124,447,932,612.29
  5. Step 5: Solve for x
    x = 124,447,932,612.29/391,488.92
  6. Step 6: Final answer
    x = 317,883.66

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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.