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Finding the Fourth Proportional to 1,397.62, 2,095.56 and 472.90

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Solution

The fourth proportional to 1,397.62, 2,095.56 and 472.90 is: 709.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.62 : 2,095.56 = 472.90 : x
  2. Step 2: Convert to fraction form
    1,397.62/2,095.56 = 472.90/x
  3. Step 3: Cross multiply
    1,397.62x = 2,095.56 × 472.90
  4. Step 4: Simplify right side
    1,397.62x = 990,990.32
  5. Step 5: Solve for x
    x = 990,990.32/1,397.62
  6. Step 6: Final answer
    x = 709.06

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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.