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Finding the Fourth Proportional to 1,474.47, 2,212.47 and 653.31

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Solution

The fourth proportional to 1,474.47, 2,212.47 and 653.31 is: 980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,474.47 : 2,212.47 = 653.31 : x
  2. Step 2: Convert to fraction form
    1,474.47/2,212.47 = 653.31/x
  3. Step 3: Cross multiply
    1,474.47x = 2,212.47 × 653.31
  4. Step 4: Simplify right side
    1,474.47x = 1,445,428.78
  5. Step 5: Solve for x
    x = 1,445,428.78/1,474.47
  6. Step 6: Final answer
    x = 980.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.