Home / 717,494,287.92-990,142,107.48-387,469,417.20

Finding the Fourth Proportional to 717,494,287.92, 990,142,107.48 and 387,469,417.20

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Solution

The fourth proportional to 717,494,287.92, 990,142,107.48 and 387,469,417.20 is: 534,707,790.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,494,287.92 : 990,142,107.48 = 387,469,417.20 : x
  2. Step 2: Convert to fraction form
    717,494,287.92/990,142,107.48 = 387,469,417.20/x
  3. Step 3: Cross multiply
    717,494,287.92x = 990,142,107.48 × 387,469,417.20
  4. Step 4: Simplify right side
    717,494,287.92x = 383,649,785,330,455,360
  5. Step 5: Solve for x
    x = 383,649,785,330,455,360/717,494,287.92
  6. Step 6: Final answer
    x = 534,707,790.42

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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.