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Finding the Fourth Proportional to 900.17, 1,242.72 and 606.99

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Solution

The fourth proportional to 900.17, 1,242.72 and 606.99 is: 837.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.17 : 1,242.72 = 606.99 : x
  2. Step 2: Convert to fraction form
    900.17/1,242.72 = 606.99/x
  3. Step 3: Cross multiply
    900.17x = 1,242.72 × 606.99
  4. Step 4: Simplify right side
    900.17x = 754,318.61
  5. Step 5: Solve for x
    x = 754,318.61/900.17
  6. Step 6: Final answer
    x = 837.97

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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.