Home / 718,923.78-992,118.29-396,633.87

Finding the Fourth Proportional to 718,923.78, 992,118.29 and 396,633.87

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Solution

The fourth proportional to 718,923.78, 992,118.29 and 396,633.87 is: 547,356.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,923.78 : 992,118.29 = 396,633.87 : x
  2. Step 2: Convert to fraction form
    718,923.78/992,118.29 = 396,633.87/x
  3. Step 3: Cross multiply
    718,923.78x = 992,118.29 × 396,633.87
  4. Step 4: Simplify right side
    718,923.78x = 393,507,714,877.31
  5. Step 5: Solve for x
    x = 393,507,714,877.31/718,923.78
  6. Step 6: Final answer
    x = 547,356.65

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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.