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Finding the Fourth Proportional to 1,362.72, 2,042.80 and 632.08

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Solution

The fourth proportional to 1,362.72, 2,042.80 and 632.08 is: 947.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.72 : 2,042.80 = 632.08 : x
  2. Step 2: Convert to fraction form
    1,362.72/2,042.80 = 632.08/x
  3. Step 3: Cross multiply
    1,362.72x = 2,042.80 × 632.08
  4. Step 4: Simplify right side
    1,362.72x = 1,291,213.02
  5. Step 5: Solve for x
    x = 1,291,213.02/1,362.72
  6. Step 6: Final answer
    x = 947.53

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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.