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Finding the Fourth Proportional to 450,278.88, 621,324 and 256,711.56

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Solution

The fourth proportional to 450,278.88, 621,324 and 256,711.56 is: 354,227.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,278.88 : 621,324 = 256,711.56 : x
  2. Step 2: Convert to fraction form
    450,278.88/621,324 = 256,711.56/x
  3. Step 3: Cross multiply
    450,278.88x = 621,324 × 256,711.56
  4. Step 4: Simplify right side
    450,278.88x = 159,501,053,305.44
  5. Step 5: Solve for x
    x = 159,501,053,305.44/450,278.88
  6. Step 6: Final answer
    x = 354,227.26

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1.5x scale

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.