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Finding the Fourth Proportional to 1,122.76, 1,549.32 and 625.36

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Solution

The fourth proportional to 1,122.76, 1,549.32 and 625.36 is: 862.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.76 : 1,549.32 = 625.36 : x
  2. Step 2: Convert to fraction form
    1,122.76/1,549.32 = 625.36/x
  3. Step 3: Cross multiply
    1,122.76x = 1,549.32 × 625.36
  4. Step 4: Simplify right side
    1,122.76x = 968,882.76
  5. Step 5: Solve for x
    x = 968,882.76/1,122.76
  6. Step 6: Final answer
    x = 862.95

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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.