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Finding the Fourth Proportional to 983.95, 1,357.76 and 541.74

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Solution

The fourth proportional to 983.95, 1,357.76 and 541.74 is: 747.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.95 : 1,357.76 = 541.74 : x
  2. Step 2: Convert to fraction form
    983.95/1,357.76 = 541.74/x
  3. Step 3: Cross multiply
    983.95x = 1,357.76 × 541.74
  4. Step 4: Simplify right side
    983.95x = 735,551.71
  5. Step 5: Solve for x
    x = 735,551.71/983.95
  6. Step 6: Final answer
    x = 747.55

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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.