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Finding the Fourth Proportional to 1,243.60, 1,865.60 and 474.16

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Solution

The fourth proportional to 1,243.60, 1,865.60 and 474.16 is: 711.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.60 : 1,865.60 = 474.16 : x
  2. Step 2: Convert to fraction form
    1,243.60/1,865.60 = 474.16/x
  3. Step 3: Cross multiply
    1,243.60x = 1,865.60 × 474.16
  4. Step 4: Simplify right side
    1,243.60x = 884,592.90
  5. Step 5: Solve for x
    x = 884,592.90/1,243.60
  6. Step 6: Final answer
    x = 711.32

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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.