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Finding the Fourth Proportional to 924.59, 1,386.93 and 877.88

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Solution

The fourth proportional to 924.59, 1,386.93 and 877.88 is: 1,316.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.59 : 1,386.93 = 877.88 : x
  2. Step 2: Convert to fraction form
    924.59/1,386.93 = 877.88/x
  3. Step 3: Cross multiply
    924.59x = 1,386.93 × 877.88
  4. Step 4: Simplify right side
    924.59x = 1,217,558.11
  5. Step 5: Solve for x
    x = 1,217,558.11/924.59
  6. Step 6: Final answer
    x = 1,316.86

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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.