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Finding the Fourth Proportional to 1,543.37, 2,315.16 and 432.95

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Solution

The fourth proportional to 1,543.37, 2,315.16 and 432.95 is: 649.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.37 : 2,315.16 = 432.95 : x
  2. Step 2: Convert to fraction form
    1,543.37/2,315.16 = 432.95/x
  3. Step 3: Cross multiply
    1,543.37x = 2,315.16 × 432.95
  4. Step 4: Simplify right side
    1,543.37x = 1,002,336.95
  5. Step 5: Solve for x
    x = 1,002,336.95/1,543.37
  6. Step 6: Final answer
    x = 649.45

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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.