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Finding the Fourth Proportional to 843.58, 1,264.44 and 432.12

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Solution

The fourth proportional to 843.58, 1,264.44 and 432.12 is: 647.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.58 : 1,264.44 = 432.12 : x
  2. Step 2: Convert to fraction form
    843.58/1,264.44 = 432.12/x
  3. Step 3: Cross multiply
    843.58x = 1,264.44 × 432.12
  4. Step 4: Simplify right side
    843.58x = 546,389.81
  5. Step 5: Solve for x
    x = 546,389.81/843.58
  6. Step 6: Final answer
    x = 647.70

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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.