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Finding the Fourth Proportional to 731.88, 1,008.99 and 620.91

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Solution

The fourth proportional to 731.88, 1,008.99 and 620.91 is: 856.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.88 : 1,008.99 = 620.91 : x
  2. Step 2: Convert to fraction form
    731.88/1,008.99 = 620.91/x
  3. Step 3: Cross multiply
    731.88x = 1,008.99 × 620.91
  4. Step 4: Simplify right side
    731.88x = 626,491.98
  5. Step 5: Solve for x
    x = 626,491.98/731.88
  6. Step 6: Final answer
    x = 856.00

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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.