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Finding the Fourth Proportional to 888.64, 1,225.74 and 539.53

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Solution

The fourth proportional to 888.64, 1,225.74 and 539.53 is: 744.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.64 : 1,225.74 = 539.53 : x
  2. Step 2: Convert to fraction form
    888.64/1,225.74 = 539.53/x
  3. Step 3: Cross multiply
    888.64x = 1,225.74 × 539.53
  4. Step 4: Simplify right side
    888.64x = 661,323.50
  5. Step 5: Solve for x
    x = 661,323.50/888.64
  6. Step 6: Final answer
    x = 744.20

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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.