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Finding the Fourth Proportional to 872.34, 1,203.95 and 499.23

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Solution

The fourth proportional to 872.34, 1,203.95 and 499.23 is: 689.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.34 : 1,203.95 = 499.23 : x
  2. Step 2: Convert to fraction form
    872.34/1,203.95 = 499.23/x
  3. Step 3: Cross multiply
    872.34x = 1,203.95 × 499.23
  4. Step 4: Simplify right side
    872.34x = 601,045.46
  5. Step 5: Solve for x
    x = 601,045.46/872.34
  6. Step 6: Final answer
    x = 689.00

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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.