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Finding the Fourth Proportional to 343,686.59, 515,555.18 and 90,965.38

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Solution

The fourth proportional to 343,686.59, 515,555.18 and 90,965.38 is: 136,454.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,686.59 : 515,555.18 = 90,965.38 : x
  2. Step 2: Convert to fraction form
    343,686.59/515,555.18 = 90,965.38/x
  3. Step 3: Cross multiply
    343,686.59x = 515,555.18 × 90,965.38
  4. Step 4: Simplify right side
    343,686.59x = 46,897,672,423.74
  5. Step 5: Solve for x
    x = 46,897,672,423.74/343,686.59
  6. Step 6: Final answer
    x = 136,454.76

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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.