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Finding the Fourth Proportional to 1,042.32, 1,563.48 and 586.64

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Solution

The fourth proportional to 1,042.32, 1,563.48 and 586.64 is: 879.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.32 : 1,563.48 = 586.64 : x
  2. Step 2: Convert to fraction form
    1,042.32/1,563.48 = 586.64/x
  3. Step 3: Cross multiply
    1,042.32x = 1,563.48 × 586.64
  4. Step 4: Simplify right side
    1,042.32x = 917,199.91
  5. Step 5: Solve for x
    x = 917,199.91/1,042.32
  6. Step 6: Final answer
    x = 879.96

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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.