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Finding the Fourth Proportional to 1,397.32, 2,095.85 and 472.77

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Solution

The fourth proportional to 1,397.32, 2,095.85 and 472.77 is: 709.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.32 : 2,095.85 = 472.77 : x
  2. Step 2: Convert to fraction form
    1,397.32/2,095.85 = 472.77/x
  3. Step 3: Cross multiply
    1,397.32x = 2,095.85 × 472.77
  4. Step 4: Simplify right side
    1,397.32x = 990,848.94
  5. Step 5: Solve for x
    x = 990,848.94/1,397.32
  6. Step 6: Final answer
    x = 709.11

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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.