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Finding the Fourth Proportional to 1,242.02, 1,713.56 and 887.98

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Solution

The fourth proportional to 1,242.02, 1,713.56 and 887.98 is: 1,225.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.02 : 1,713.56 = 887.98 : x
  2. Step 2: Convert to fraction form
    1,242.02/1,713.56 = 887.98/x
  3. Step 3: Cross multiply
    1,242.02x = 1,713.56 × 887.98
  4. Step 4: Simplify right side
    1,242.02x = 1,521,607.01
  5. Step 5: Solve for x
    x = 1,521,607.01/1,242.02
  6. Step 6: Final answer
    x = 1,225.11

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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.