Home / 718,939.80-992,140.38-396,649.88

Finding the Fourth Proportional to 718,939.80, 992,140.38 and 396,649.88

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Solution

The fourth proportional to 718,939.80, 992,140.38 and 396,649.88 is: 547,378.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,939.80 : 992,140.38 = 396,649.88 : x
  2. Step 2: Convert to fraction form
    718,939.80/992,140.38 = 396,649.88/x
  3. Step 3: Cross multiply
    718,939.80x = 992,140.38 × 396,649.88
  4. Step 4: Simplify right side
    718,939.80x = 393,532,362,670.15
  5. Step 5: Solve for x
    x = 393,532,362,670.15/718,939.80
  6. Step 6: Final answer
    x = 547,378.74

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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.