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Finding the Fourth Proportional to 2,362.18, 3,543.78 and 718.90

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Solution

The fourth proportional to 2,362.18, 3,543.78 and 718.90 is: 1,078.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,362.18 : 3,543.78 = 718.90 : x
  2. Step 2: Convert to fraction form
    2,362.18/3,543.78 = 718.90/x
  3. Step 3: Cross multiply
    2,362.18x = 3,543.78 × 718.90
  4. Step 4: Simplify right side
    2,362.18x = 2,547,623.44
  5. Step 5: Solve for x
    x = 2,547,623.44/2,362.18
  6. Step 6: Final answer
    x = 1,078.51

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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.