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Finding the Fourth Proportional to 718,994.79, 992,212.07 and 396,704.86

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Solution

The fourth proportional to 718,994.79, 992,212.07 and 396,704.86 is: 547,452.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,994.79 : 992,212.07 = 396,704.86 : x
  2. Step 2: Convert to fraction form
    718,994.79/992,212.07 = 396,704.86/x
  3. Step 3: Cross multiply
    718,994.79x = 992,212.07 × 396,704.86
  4. Step 4: Simplify right side
    718,994.79x = 393,615,350,319.66
  5. Step 5: Solve for x
    x = 393,615,350,319.66/718,994.79
  6. Step 6: Final answer
    x = 547,452.30

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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.