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Finding the Fourth Proportional to 518,422.12, 715,464.02 and 289,053.74

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Solution

The fourth proportional to 518,422.12, 715,464.02 and 289,053.74 is: 398,917.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,422.12 : 715,464.02 = 289,053.74 : x
  2. Step 2: Convert to fraction form
    518,422.12/715,464.02 = 289,053.74/x
  3. Step 3: Cross multiply
    518,422.12x = 715,464.02 × 289,053.74
  4. Step 4: Simplify right side
    518,422.12x = 206,807,550,816.44
  5. Step 5: Solve for x
    x = 206,807,550,816.44/518,422.12
  6. Step 6: Final answer
    x = 398,917.30

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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.