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Finding the Fourth Proportional to 1,072,849.55, 1,480,020.80 and 781,837.20

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Solution

The fourth proportional to 1,072,849.55, 1,480,020.80 and 781,837.20 is: 1,078,562.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072,849.55 : 1,480,020.80 = 781,837.20 : x
  2. Step 2: Convert to fraction form
    1,072,849.55/1,480,020.80 = 781,837.20/x
  3. Step 3: Cross multiply
    1,072,849.55x = 1,480,020.80 × 781,837.20
  4. Step 4: Simplify right side
    1,072,849.55x = 1,157,135,314,304.57
  5. Step 5: Solve for x
    x = 1,157,135,314,304.57/1,072,849.55
  6. Step 6: Final answer
    x = 1,078,562.53

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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.