Home / 861,465.78-1,188,822.83-479,484.36

Finding the Fourth Proportional to 861,465.78, 1,188,822.83 and 479,484.36

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Solution

The fourth proportional to 861,465.78, 1,188,822.83 and 479,484.36 is: 661,688.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,465.78 : 1,188,822.83 = 479,484.36 : x
  2. Step 2: Convert to fraction form
    861,465.78/1,188,822.83 = 479,484.36/x
  3. Step 3: Cross multiply
    861,465.78x = 1,188,822.83 × 479,484.36
  4. Step 4: Simplify right side
    861,465.78x = 570,021,951,398.52
  5. Step 5: Solve for x
    x = 570,021,951,398.52/861,465.78
  6. Step 6: Final answer
    x = 661,688.44

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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.