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Finding the Fourth Proportional to 1,547,840.72, 2,135,903 and 868,646

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Solution

The fourth proportional to 1,547,840.72, 2,135,903 and 868,646 is: 1,198,665.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547,840.72 : 2,135,903 = 868,646 : x
  2. Step 2: Convert to fraction form
    1,547,840.72/2,135,903 = 868,646/x
  3. Step 3: Cross multiply
    1,547,840.72x = 2,135,903 × 868,646
  4. Step 4: Simplify right side
    1,547,840.72x = 1,855,343,597,338
  5. Step 5: Solve for x
    x = 1,855,343,597,338/1,547,840.72
  6. Step 6: Final answer
    x = 1,198,665.71

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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.