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Finding the Fourth Proportional to 885.08, 1,318.06 and 862.40

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Solution

The fourth proportional to 885.08, 1,318.06 and 862.40 is: 1,284.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.08 : 1,318.06 = 862.40 : x
  2. Step 2: Convert to fraction form
    885.08/1,318.06 = 862.40/x
  3. Step 3: Cross multiply
    885.08x = 1,318.06 × 862.40
  4. Step 4: Simplify right side
    885.08x = 1,136,694.94
  5. Step 5: Solve for x
    x = 1,136,694.94/885.08
  6. Step 6: Final answer
    x = 1,284.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.