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Finding the Fourth Proportional to 976.47, 1,347.65 and 603.39

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Solution

The fourth proportional to 976.47, 1,347.65 and 603.39 is: 832.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.47 : 1,347.65 = 603.39 : x
  2. Step 2: Convert to fraction form
    976.47/1,347.65 = 603.39/x
  3. Step 3: Cross multiply
    976.47x = 1,347.65 × 603.39
  4. Step 4: Simplify right side
    976.47x = 813,155.52
  5. Step 5: Solve for x
    x = 813,155.52/976.47
  6. Step 6: Final answer
    x = 832.75

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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.