Home / 1,380,489.12-1,904,781.06-807,417.36

Finding the Fourth Proportional to 1,380,489.12, 1,904,781.06 and 807,417.36

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Solution

The fourth proportional to 1,380,489.12, 1,904,781.06 and 807,417.36 is: 1,114,064.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,489.12 : 1,904,781.06 = 807,417.36 : x
  2. Step 2: Convert to fraction form
    1,380,489.12/1,904,781.06 = 807,417.36/x
  3. Step 3: Cross multiply
    1,380,489.12x = 1,904,781.06 × 807,417.36
  4. Step 4: Simplify right side
    1,380,489.12x = 1,537,953,294,843.20
  5. Step 5: Solve for x
    x = 1,537,953,294,843.20/1,380,489.12
  6. Step 6: Final answer
    x = 1,114,064.05

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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.