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Finding the Fourth Proportional to 356,708.60, 535,063.86 and 90,469.28

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Solution

The fourth proportional to 356,708.60, 535,063.86 and 90,469.28 is: 135,704.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,708.60 : 535,063.86 = 90,469.28 : x
  2. Step 2: Convert to fraction form
    356,708.60/535,063.86 = 90,469.28/x
  3. Step 3: Cross multiply
    356,708.60x = 535,063.86 × 90,469.28
  4. Step 4: Simplify right side
    356,708.60x = 48,406,842,168.22
  5. Step 5: Solve for x
    x = 48,406,842,168.22/356,708.60
  6. Step 6: Final answer
    x = 135,704.16

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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.