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Finding the Fourth Proportional to 646,254.98, 891,251.26 and 404,559.55

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Solution

The fourth proportional to 646,254.98, 891,251.26 and 404,559.55 is: 557,928.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,254.98 : 891,251.26 = 404,559.55 : x
  2. Step 2: Convert to fraction form
    646,254.98/891,251.26 = 404,559.55/x
  3. Step 3: Cross multiply
    646,254.98x = 891,251.26 × 404,559.55
  4. Step 4: Simplify right side
    646,254.98x = 360,564,208,682.53
  5. Step 5: Solve for x
    x = 360,564,208,682.53/646,254.98
  6. Step 6: Final answer
    x = 557,928.71

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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.