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Finding the Fourth Proportional to 879.52, 1,317.36 and 707.36

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Solution

The fourth proportional to 879.52, 1,317.36 and 707.36 is: 1,059.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.52 : 1,317.36 = 707.36 : x
  2. Step 2: Convert to fraction form
    879.52/1,317.36 = 707.36/x
  3. Step 3: Cross multiply
    879.52x = 1,317.36 × 707.36
  4. Step 4: Simplify right side
    879.52x = 931,847.77
  5. Step 5: Solve for x
    x = 931,847.77/879.52
  6. Step 6: Final answer
    x = 1,059.50

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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.