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Finding the Fourth Proportional to 356,279.70, 534,419.58 and 90,040.98

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Solution

The fourth proportional to 356,279.70, 534,419.58 and 90,040.98 is: 135,061.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,279.70 : 534,419.58 = 90,040.98 : x
  2. Step 2: Convert to fraction form
    356,279.70/534,419.58 = 90,040.98/x
  3. Step 3: Cross multiply
    356,279.70x = 534,419.58 × 90,040.98
  4. Step 4: Simplify right side
    356,279.70x = 48,119,662,714.39
  5. Step 5: Solve for x
    x = 48,119,662,714.39/356,279.70
  6. Step 6: Final answer
    x = 135,061.48

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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.