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Finding the Fourth Proportional to 391,428.99, 540,162.79 and 230,294.40

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Solution

The fourth proportional to 391,428.99, 540,162.79 and 230,294.40 is: 317,800.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,428.99 : 540,162.79 = 230,294.40 : x
  2. Step 2: Convert to fraction form
    391,428.99/540,162.79 = 230,294.40/x
  3. Step 3: Cross multiply
    391,428.99x = 540,162.79 × 230,294.40
  4. Step 4: Simplify right side
    391,428.99x = 124,396,465,625.38
  5. Step 5: Solve for x
    x = 124,396,465,625.38/391,428.99
  6. Step 6: Final answer
    x = 317,800.85

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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.