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Finding the Fourth Proportional to 1,543.43, 2,316.06 and 618.84

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Solution

The fourth proportional to 1,543.43, 2,316.06 and 618.84 is: 928.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.43 : 2,316.06 = 618.84 : x
  2. Step 2: Convert to fraction form
    1,543.43/2,316.06 = 618.84/x
  3. Step 3: Cross multiply
    1,543.43x = 2,316.06 × 618.84
  4. Step 4: Simplify right side
    1,543.43x = 1,433,270.57
  5. Step 5: Solve for x
    x = 1,433,270.57/1,543.43
  6. Step 6: Final answer
    x = 928.63

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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.