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Finding the Fourth Proportional to 938.19, 1,407.30 and 555.87

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Solution

The fourth proportional to 938.19, 1,407.30 and 555.87 is: 833.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.19 : 1,407.30 = 555.87 : x
  2. Step 2: Convert to fraction form
    938.19/1,407.30 = 555.87/x
  3. Step 3: Cross multiply
    938.19x = 1,407.30 × 555.87
  4. Step 4: Simplify right side
    938.19x = 782,275.85
  5. Step 5: Solve for x
    x = 782,275.85/938.19
  6. Step 6: Final answer
    x = 833.81

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.