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Finding the Fourth Proportional to 900.08, 1,242.36 and 551.12

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Solution

The fourth proportional to 900.08, 1,242.36 and 551.12 is: 760.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.08 : 1,242.36 = 551.12 : x
  2. Step 2: Convert to fraction form
    900.08/1,242.36 = 551.12/x
  3. Step 3: Cross multiply
    900.08x = 1,242.36 × 551.12
  4. Step 4: Simplify right side
    900.08x = 684,689.44
  5. Step 5: Solve for x
    x = 684,689.44/900.08
  6. Step 6: Final answer
    x = 760.70

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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.