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Finding the Fourth Proportional to 918.55, 1,267.17 and 525.34

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Solution

The fourth proportional to 918.55, 1,267.17 and 525.34 is: 724.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.55 : 1,267.17 = 525.34 : x
  2. Step 2: Convert to fraction form
    918.55/1,267.17 = 525.34/x
  3. Step 3: Cross multiply
    918.55x = 1,267.17 × 525.34
  4. Step 4: Simplify right side
    918.55x = 665,695.09
  5. Step 5: Solve for x
    x = 665,695.09/918.55
  6. Step 6: Final answer
    x = 724.72

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1.5x scale

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.