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Finding the Fourth Proportional to 947.50, 1,307.63 and 527.87

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Solution

The fourth proportional to 947.50, 1,307.63 and 527.87 is: 728.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.50 : 1,307.63 = 527.87 : x
  2. Step 2: Convert to fraction form
    947.50/1,307.63 = 527.87/x
  3. Step 3: Cross multiply
    947.50x = 1,307.63 × 527.87
  4. Step 4: Simplify right side
    947.50x = 690,263.24
  5. Step 5: Solve for x
    x = 690,263.24/947.50
  6. Step 6: Final answer
    x = 728.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.