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Finding the Fourth Proportional to 1,031.00, 1,420.34 and 732.11

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Solution

The fourth proportional to 1,031.00, 1,420.34 and 732.11 is: 1,008.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.00 : 1,420.34 = 732.11 : x
  2. Step 2: Convert to fraction form
    1,031.00/1,420.34 = 732.11/x
  3. Step 3: Cross multiply
    1,031.00x = 1,420.34 × 732.11
  4. Step 4: Simplify right side
    1,031.00x = 1,039,834.36
  5. Step 5: Solve for x
    x = 1,039,834.36/1,031.00
  6. Step 6: Final answer
    x = 1,008.57

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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.