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Finding the Fourth Proportional to 757.35, 1,134.18 and 432.36

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Solution

The fourth proportional to 757.35, 1,134.18 and 432.36 is: 647.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.35 : 1,134.18 = 432.36 : x
  2. Step 2: Convert to fraction form
    757.35/1,134.18 = 432.36/x
  3. Step 3: Cross multiply
    757.35x = 1,134.18 × 432.36
  4. Step 4: Simplify right side
    757.35x = 490,374.06
  5. Step 5: Solve for x
    x = 490,374.06/757.35
  6. Step 6: Final answer
    x = 647.49

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Double scale
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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.