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Finding the Fourth Proportional to 1,254.51, 1,881.78 and 432.75

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Solution

The fourth proportional to 1,254.51, 1,881.78 and 432.75 is: 649.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.51 : 1,881.78 = 432.75 : x
  2. Step 2: Convert to fraction form
    1,254.51/1,881.78 = 432.75/x
  3. Step 3: Cross multiply
    1,254.51x = 1,881.78 × 432.75
  4. Step 4: Simplify right side
    1,254.51x = 814,340.30
  5. Step 5: Solve for x
    x = 814,340.30/1,254.51
  6. Step 6: Final answer
    x = 649.13

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Double scale
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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.