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Finding the Fourth Proportional to 886.92, 1,224.68 and 555.72

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Solution

The fourth proportional to 886.92, 1,224.68 and 555.72 is: 767.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.92 : 1,224.68 = 555.72 : x
  2. Step 2: Convert to fraction form
    886.92/1,224.68 = 555.72/x
  3. Step 3: Cross multiply
    886.92x = 1,224.68 × 555.72
  4. Step 4: Simplify right side
    886.92x = 680,579.17
  5. Step 5: Solve for x
    x = 680,579.17/886.92
  6. Step 6: Final answer
    x = 767.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.