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Finding the Fourth Proportional to 1,864.15, 2,796.54 and 631.56

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Solution

The fourth proportional to 1,864.15, 2,796.54 and 631.56 is: 947.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,864.15 : 2,796.54 = 631.56 : x
  2. Step 2: Convert to fraction form
    1,864.15/2,796.54 = 631.56/x
  3. Step 3: Cross multiply
    1,864.15x = 2,796.54 × 631.56
  4. Step 4: Simplify right side
    1,864.15x = 1,766,182.80
  5. Step 5: Solve for x
    x = 1,766,182.80/1,864.15
  6. Step 6: Final answer
    x = 947.45

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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.