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Finding the Fourth Proportional to 286,318.80, 429,368.85 and 86,572.80

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Solution

The fourth proportional to 286,318.80, 429,368.85 and 86,572.80 is: 129,826.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,318.80 : 429,368.85 = 86,572.80 : x
  2. Step 2: Convert to fraction form
    286,318.80/429,368.85 = 86,572.80/x
  3. Step 3: Cross multiply
    286,318.80x = 429,368.85 × 86,572.80
  4. Step 4: Simplify right side
    286,318.80x = 37,171,663,577.28
  5. Step 5: Solve for x
    x = 37,171,663,577.28/286,318.80
  6. Step 6: Final answer
    x = 129,826.14

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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.