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Finding the Fourth Proportional to 1,451.98, 2,178.12 and 630.02

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Solution

The fourth proportional to 1,451.98, 2,178.12 and 630.02 is: 945.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.98 : 2,178.12 = 630.02 : x
  2. Step 2: Convert to fraction form
    1,451.98/2,178.12 = 630.02/x
  3. Step 3: Cross multiply
    1,451.98x = 2,178.12 × 630.02
  4. Step 4: Simplify right side
    1,451.98x = 1,372,259.16
  5. Step 5: Solve for x
    x = 1,372,259.16/1,451.98
  6. Step 6: Final answer
    x = 945.10

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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.