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Finding the Fourth Proportional to 1,576,557, 2,175,657.42 and 861,165

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Solution

The fourth proportional to 1,576,557, 2,175,657.42 and 861,165 is: 1,188,412.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,576,557 : 2,175,657.42 = 861,165 : x
  2. Step 2: Convert to fraction form
    1,576,557/2,175,657.42 = 861,165/x
  3. Step 3: Cross multiply
    1,576,557x = 2,175,657.42 × 861,165
  4. Step 4: Simplify right side
    1,576,557x = 1,873,600,022,094.30
  5. Step 5: Solve for x
    x = 1,873,600,022,094.30/1,576,557
  6. Step 6: Final answer
    x = 1,188,412.48

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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.