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Finding the Fourth Proportional to 900.17, 1,242.81 and 734.78

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Solution

The fourth proportional to 900.17, 1,242.81 and 734.78 is: 1,014.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.17 : 1,242.81 = 734.78 : x
  2. Step 2: Convert to fraction form
    900.17/1,242.81 = 734.78/x
  3. Step 3: Cross multiply
    900.17x = 1,242.81 × 734.78
  4. Step 4: Simplify right side
    900.17x = 913,182.96
  5. Step 5: Solve for x
    x = 913,182.96/900.17
  6. Step 6: Final answer
    x = 1,014.46

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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.