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Finding the Fourth Proportional to 942.04, 1,298.82 and 631

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Solution

The fourth proportional to 942.04, 1,298.82 and 631 is: 869.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.04 : 1,298.82 = 631 : x
  2. Step 2: Convert to fraction form
    942.04/1,298.82 = 631/x
  3. Step 3: Cross multiply
    942.04x = 1,298.82 × 631
  4. Step 4: Simplify right side
    942.04x = 819,555.42
  5. Step 5: Solve for x
    x = 819,555.42/942.04
  6. Step 6: Final answer
    x = 869.98

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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.