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Finding the Fourth Proportional to 285,644.96, 428,468.96 and 85,963.98

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Solution

The fourth proportional to 285,644.96, 428,468.96 and 85,963.98 is: 128,946.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,644.96 : 428,468.96 = 85,963.98 : x
  2. Step 2: Convert to fraction form
    285,644.96/428,468.96 = 85,963.98/x
  3. Step 3: Cross multiply
    285,644.96x = 428,468.96 × 85,963.98
  4. Step 4: Simplify right side
    285,644.96x = 36,832,897,108.06
  5. Step 5: Solve for x
    x = 36,832,897,108.06/285,644.96
  6. Step 6: Final answer
    x = 128,946.43

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1.5x scale

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.