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Finding the Fourth Proportional to 620,995.14, 931,854.15 and 261,139.95

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Solution

The fourth proportional to 620,995.14, 931,854.15 and 261,139.95 is: 391,861.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,995.14 : 931,854.15 = 261,139.95 : x
  2. Step 2: Convert to fraction form
    620,995.14/931,854.15 = 261,139.95/x
  3. Step 3: Cross multiply
    620,995.14x = 931,854.15 × 261,139.95
  4. Step 4: Simplify right side
    620,995.14x = 243,344,346,138.29
  5. Step 5: Solve for x
    x = 243,344,346,138.29/620,995.14
  6. Step 6: Final answer
    x = 391,861.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.