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Finding the Fourth Proportional to 900.86, 1,350.27 and 554.45

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Solution

The fourth proportional to 900.86, 1,350.27 and 554.45 is: 831.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.86 : 1,350.27 = 554.45 : x
  2. Step 2: Convert to fraction form
    900.86/1,350.27 = 554.45/x
  3. Step 3: Cross multiply
    900.86x = 1,350.27 × 554.45
  4. Step 4: Simplify right side
    900.86x = 748,650.45
  5. Step 5: Solve for x
    x = 748,650.45/900.86
  6. Step 6: Final answer
    x = 831.04

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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.