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Finding the Fourth Proportional to 391,488.95, 540,229.16 and 230,312.85

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Solution

The fourth proportional to 391,488.95, 540,229.16 and 230,312.85 is: 317,816.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,488.95 : 540,229.16 = 230,312.85 : x
  2. Step 2: Convert to fraction form
    391,488.95/540,229.16 = 230,312.85/x
  3. Step 3: Cross multiply
    391,488.95x = 540,229.16 × 230,312.85
  4. Step 4: Simplify right side
    391,488.95x = 124,421,716,341.14
  5. Step 5: Solve for x
    x = 124,421,716,341.14/391,488.95
  6. Step 6: Final answer
    x = 317,816.68

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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.