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Finding the Fourth Proportional to 287,396.64, 430,045.20 and 169,123.68

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Solution

The fourth proportional to 287,396.64, 430,045.20 and 169,123.68 is: 253,067.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,396.64 : 430,045.20 = 169,123.68 : x
  2. Step 2: Convert to fraction form
    287,396.64/430,045.20 = 169,123.68/x
  3. Step 3: Cross multiply
    287,396.64x = 430,045.20 × 169,123.68
  4. Step 4: Simplify right side
    287,396.64x = 72,730,826,790.34
  5. Step 5: Solve for x
    x = 72,730,826,790.34/287,396.64
  6. Step 6: Final answer
    x = 253,067.77

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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.