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Finding the Fourth Proportional to 983.76, 1,357.59 and 541.68

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Solution

The fourth proportional to 983.76, 1,357.59 and 541.68 is: 747.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.76 : 1,357.59 = 541.68 : x
  2. Step 2: Convert to fraction form
    983.76/1,357.59 = 541.68/x
  3. Step 3: Cross multiply
    983.76x = 1,357.59 × 541.68
  4. Step 4: Simplify right side
    983.76x = 735,379.35
  5. Step 5: Solve for x
    x = 735,379.35/983.76
  6. Step 6: Final answer
    x = 747.52

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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.