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Finding the Fourth Proportional to 285,384.60, 428,081.07 and 135,640.17

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Solution

The fourth proportional to 285,384.60, 428,081.07 and 135,640.17 is: 203,462.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,384.60 : 428,081.07 = 135,640.17 : x
  2. Step 2: Convert to fraction form
    285,384.60/428,081.07 = 135,640.17/x
  3. Step 3: Cross multiply
    285,384.60x = 428,081.07 × 135,640.17
  4. Step 4: Simplify right side
    285,384.60x = 58,064,989,108.58
  5. Step 5: Solve for x
    x = 58,064,989,108.58/285,384.60
  6. Step 6: Final answer
    x = 203,462.24

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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.