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Finding the Fourth Proportional to 3,124.02, 4,686.08 and 815.52

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Solution

The fourth proportional to 3,124.02, 4,686.08 and 815.52 is: 1,223.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.02 : 4,686.08 = 815.52 : x
  2. Step 2: Convert to fraction form
    3,124.02/4,686.08 = 815.52/x
  3. Step 3: Cross multiply
    3,124.02x = 4,686.08 × 815.52
  4. Step 4: Simplify right side
    3,124.02x = 3,821,591.96
  5. Step 5: Solve for x
    x = 3,821,591.96/3,124.02
  6. Step 6: Final answer
    x = 1,223.29

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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.