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Finding the Fourth Proportional to 973.11, 1,342.40 and 658.39

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Solution

The fourth proportional to 973.11, 1,342.40 and 658.39 is: 908.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.11 : 1,342.40 = 658.39 : x
  2. Step 2: Convert to fraction form
    973.11/1,342.40 = 658.39/x
  3. Step 3: Cross multiply
    973.11x = 1,342.40 × 658.39
  4. Step 4: Simplify right side
    973.11x = 883,822.74
  5. Step 5: Solve for x
    x = 883,822.74/973.11
  6. Step 6: Final answer
    x = 908.25

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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.