Home / 718,723.74-991,821.38-396,426.91

Finding the Fourth Proportional to 718,723.74, 991,821.38 and 396,426.91

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Solution

The fourth proportional to 718,723.74, 991,821.38 and 396,426.91 is: 547,059.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,723.74 : 991,821.38 = 396,426.91 : x
  2. Step 2: Convert to fraction form
    718,723.74/991,821.38 = 396,426.91/x
  3. Step 3: Cross multiply
    718,723.74x = 991,821.38 × 396,426.91
  4. Step 4: Simplify right side
    718,723.74x = 393,184,682,963.20
  5. Step 5: Solve for x
    x = 393,184,682,963.20/718,723.74
  6. Step 6: Final answer
    x = 547,059.55

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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.