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Finding the Fourth Proportional to 880.03, 1,321.07 and 618.96

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Solution

The fourth proportional to 880.03, 1,321.07 and 618.96 is: 929.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.03 : 1,321.07 = 618.96 : x
  2. Step 2: Convert to fraction form
    880.03/1,321.07 = 618.96/x
  3. Step 3: Cross multiply
    880.03x = 1,321.07 × 618.96
  4. Step 4: Simplify right side
    880.03x = 817,689.49
  5. Step 5: Solve for x
    x = 817,689.49/880.03
  6. Step 6: Final answer
    x = 929.16

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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.