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Finding the Fourth Proportional to 876.41, 1,209.53 and 654.98

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Solution

The fourth proportional to 876.41, 1,209.53 and 654.98 is: 903.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.41 : 1,209.53 = 654.98 : x
  2. Step 2: Convert to fraction form
    876.41/1,209.53 = 654.98/x
  3. Step 3: Cross multiply
    876.41x = 1,209.53 × 654.98
  4. Step 4: Simplify right side
    876.41x = 792,211.91
  5. Step 5: Solve for x
    x = 792,211.91/876.41
  6. Step 6: Final answer
    x = 903.93

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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.