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Finding the Fourth Proportional to 902.01, 1,244.69 and 509.13

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Solution

The fourth proportional to 902.01, 1,244.69 and 509.13 is: 702.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.01 : 1,244.69 = 509.13 : x
  2. Step 2: Convert to fraction form
    902.01/1,244.69 = 509.13/x
  3. Step 3: Cross multiply
    902.01x = 1,244.69 × 509.13
  4. Step 4: Simplify right side
    902.01x = 633,709.02
  5. Step 5: Solve for x
    x = 633,709.02/902.01
  6. Step 6: Final answer
    x = 702.55

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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.