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Finding the Fourth Proportional to 879.36, 1,318.88 and 534.90

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Solution

The fourth proportional to 879.36, 1,318.88 and 534.90 is: 802.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.36 : 1,318.88 = 534.90 : x
  2. Step 2: Convert to fraction form
    879.36/1,318.88 = 534.90/x
  3. Step 3: Cross multiply
    879.36x = 1,318.88 × 534.90
  4. Step 4: Simplify right side
    879.36x = 705,475.20
  5. Step 5: Solve for x
    x = 705,475.20/879.36
  6. Step 6: Final answer
    x = 802.26

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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.