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Finding the Fourth Proportional to 1,385,791, 1,912,397.34 and 749,887

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Solution

The fourth proportional to 1,385,791, 1,912,397.34 and 749,887 is: 1,034,847.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,791 : 1,912,397.34 = 749,887 : x
  2. Step 2: Convert to fraction form
    1,385,791/1,912,397.34 = 749,887/x
  3. Step 3: Cross multiply
    1,385,791x = 1,912,397.34 × 749,887
  4. Step 4: Simplify right side
    1,385,791x = 1,434,081,904,100.58
  5. Step 5: Solve for x
    x = 1,434,081,904,100.58/1,385,791
  6. Step 6: Final answer
    x = 1,034,847.18

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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.