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Finding the Fourth Proportional to 1,177.98, 1,767.02 and 312.30

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Solution

The fourth proportional to 1,177.98, 1,767.02 and 312.30 is: 468.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.98 : 1,767.02 = 312.30 : x
  2. Step 2: Convert to fraction form
    1,177.98/1,767.02 = 312.30/x
  3. Step 3: Cross multiply
    1,177.98x = 1,767.02 × 312.30
  4. Step 4: Simplify right side
    1,177.98x = 551,838.78
  5. Step 5: Solve for x
    x = 551,838.78/1,177.98
  6. Step 6: Final answer
    x = 468.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.