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Finding the Fourth Proportional to 1,122.65, 1,550 and 730.34

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Solution

The fourth proportional to 1,122.65, 1,550 and 730.34 is: 1,008.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.65 : 1,550 = 730.34 : x
  2. Step 2: Convert to fraction form
    1,122.65/1,550 = 730.34/x
  3. Step 3: Cross multiply
    1,122.65x = 1,550 × 730.34
  4. Step 4: Simplify right side
    1,122.65x = 1,132,027
  5. Step 5: Solve for x
    x = 1,132,027/1,122.65
  6. Step 6: Final answer
    x = 1,008.35

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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.