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Finding the Fourth Proportional to 941.84, 1,298.76 and 630.80

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Solution

The fourth proportional to 941.84, 1,298.76 and 630.80 is: 869.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.84 : 1,298.76 = 630.80 : x
  2. Step 2: Convert to fraction form
    941.84/1,298.76 = 630.80/x
  3. Step 3: Cross multiply
    941.84x = 1,298.76 × 630.80
  4. Step 4: Simplify right side
    941.84x = 819,257.81
  5. Step 5: Solve for x
    x = 819,257.81/941.84
  6. Step 6: Final answer
    x = 869.85

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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.