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Finding the Fourth Proportional to 1,398.10, 2,097.18 and 565.12

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Solution

The fourth proportional to 1,398.10, 2,097.18 and 565.12 is: 847.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.10 : 2,097.18 = 565.12 : x
  2. Step 2: Convert to fraction form
    1,398.10/2,097.18 = 565.12/x
  3. Step 3: Cross multiply
    1,398.10x = 2,097.18 × 565.12
  4. Step 4: Simplify right side
    1,398.10x = 1,185,158.36
  5. Step 5: Solve for x
    x = 1,185,158.36/1,398.10
  6. Step 6: Final answer
    x = 847.69

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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.