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Finding the Fourth Proportional to 1,572.38, 2,356.76 and 879.36

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Solution

The fourth proportional to 1,572.38, 2,356.76 and 879.36 is: 1,318.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.38 : 2,356.76 = 879.36 : x
  2. Step 2: Convert to fraction form
    1,572.38/2,356.76 = 879.36/x
  3. Step 3: Cross multiply
    1,572.38x = 2,356.76 × 879.36
  4. Step 4: Simplify right side
    1,572.38x = 2,072,433.83
  5. Step 5: Solve for x
    x = 2,072,433.83/1,572.38
  6. Step 6: Final answer
    x = 1,318.02

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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.