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Finding the Fourth Proportional to 922.76, 1,386.04 and 576.48

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Solution

The fourth proportional to 922.76, 1,386.04 and 576.48 is: 865.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.76 : 1,386.04 = 576.48 : x
  2. Step 2: Convert to fraction form
    922.76/1,386.04 = 576.48/x
  3. Step 3: Cross multiply
    922.76x = 1,386.04 × 576.48
  4. Step 4: Simplify right side
    922.76x = 799,024.34
  5. Step 5: Solve for x
    x = 799,024.34/922.76
  6. Step 6: Final answer
    x = 865.91

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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.