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Finding the Fourth Proportional to 731.19, 1,008.26 and 637.12

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Solution

The fourth proportional to 731.19, 1,008.26 and 637.12 is: 878.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.19 : 1,008.26 = 637.12 : x
  2. Step 2: Convert to fraction form
    731.19/1,008.26 = 637.12/x
  3. Step 3: Cross multiply
    731.19x = 1,008.26 × 637.12
  4. Step 4: Simplify right side
    731.19x = 642,382.61
  5. Step 5: Solve for x
    x = 642,382.61/731.19
  6. Step 6: Final answer
    x = 878.54

Related Problems

Find fourth proportional to 365.60, 504.13 and 318.56
Half scale
Find fourth proportional to 1,462.38, 2,016.52 and 1,274.24
Double scale
Find fourth proportional to 732.19, 1,009.64 and 638.12
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1.5x scale

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.