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Finding the Fourth Proportional to 1,122.40, 1,549.66 and 730.09

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Solution

The fourth proportional to 1,122.40, 1,549.66 and 730.09 is: 1,008.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.40 : 1,549.66 = 730.09 : x
  2. Step 2: Convert to fraction form
    1,122.40/1,549.66 = 730.09/x
  3. Step 3: Cross multiply
    1,122.40x = 1,549.66 × 730.09
  4. Step 4: Simplify right side
    1,122.40x = 1,131,385.57
  5. Step 5: Solve for x
    x = 1,131,385.57/1,122.40
  6. Step 6: Final answer
    x = 1,008.01

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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.