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Finding the Fourth Proportional to 873.95, 1,207.11 and 653.88

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Solution

The fourth proportional to 873.95, 1,207.11 and 653.88 is: 903.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.95 : 1,207.11 = 653.88 : x
  2. Step 2: Convert to fraction form
    873.95/1,207.11 = 653.88/x
  3. Step 3: Cross multiply
    873.95x = 1,207.11 × 653.88
  4. Step 4: Simplify right side
    873.95x = 789,305.09
  5. Step 5: Solve for x
    x = 789,305.09/873.95
  6. Step 6: Final answer
    x = 903.15

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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.