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Finding the Fourth Proportional to 900.64, 1,351.13 and 284.30

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Solution

The fourth proportional to 900.64, 1,351.13 and 284.30 is: 426.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.64 : 1,351.13 = 284.30 : x
  2. Step 2: Convert to fraction form
    900.64/1,351.13 = 284.30/x
  3. Step 3: Cross multiply
    900.64x = 1,351.13 × 284.30
  4. Step 4: Simplify right side
    900.64x = 384,126.26
  5. Step 5: Solve for x
    x = 384,126.26/900.64
  6. Step 6: Final answer
    x = 426.50

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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.