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Finding the Fourth Proportional to 888.86, 1,225.49 and 728.76

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Solution

The fourth proportional to 888.86, 1,225.49 and 728.76 is: 1,004.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.86 : 1,225.49 = 728.76 : x
  2. Step 2: Convert to fraction form
    888.86/1,225.49 = 728.76/x
  3. Step 3: Cross multiply
    888.86x = 1,225.49 × 728.76
  4. Step 4: Simplify right side
    888.86x = 893,089.91
  5. Step 5: Solve for x
    x = 893,089.91/888.86
  6. Step 6: Final answer
    x = 1,004.76

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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.