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Finding the Fourth Proportional to 1,245,600.04, 1,719,207.84 and 815,630.44

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Solution

The fourth proportional to 1,245,600.04, 1,719,207.84 and 815,630.44 is: 1,125,753.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,600.04 : 1,719,207.84 = 815,630.44 : x
  2. Step 2: Convert to fraction form
    1,245,600.04/1,719,207.84 = 815,630.44/x
  3. Step 3: Cross multiply
    1,245,600.04x = 1,719,207.84 × 815,630.44
  4. Step 4: Simplify right side
    1,245,600.04x = 1,402,238,246,990.65
  5. Step 5: Solve for x
    x = 1,402,238,246,990.65/1,245,600.04
  6. Step 6: Final answer
    x = 1,125,753.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.