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Finding the Fourth Proportional to 753.39, 1,129.63 and 558.69

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Solution

The fourth proportional to 753.39, 1,129.63 and 558.69 is: 837.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.39 : 1,129.63 = 558.69 : x
  2. Step 2: Convert to fraction form
    753.39/1,129.63 = 558.69/x
  3. Step 3: Cross multiply
    753.39x = 1,129.63 × 558.69
  4. Step 4: Simplify right side
    753.39x = 631,112.98
  5. Step 5: Solve for x
    x = 631,112.98/753.39
  6. Step 6: Final answer
    x = 837.70

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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.