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Finding the Fourth Proportional to 285,592.68, 428,302.72 and 85,860.04

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Solution

The fourth proportional to 285,592.68, 428,302.72 and 85,860.04 is: 128,764.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,592.68 : 428,302.72 = 85,860.04 : x
  2. Step 2: Convert to fraction form
    285,592.68/428,302.72 = 85,860.04/x
  3. Step 3: Cross multiply
    285,592.68x = 428,302.72 × 85,860.04
  4. Step 4: Simplify right side
    285,592.68x = 36,774,088,671.31
  5. Step 5: Solve for x
    x = 36,774,088,671.31/285,592.68
  6. Step 6: Final answer
    x = 128,764.11

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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.