Home / 660,629.80-990,944.70-394,909.30

Finding the Fourth Proportional to 660,629.80, 990,944.70 and 394,909.30

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Solution

The fourth proportional to 660,629.80, 990,944.70 and 394,909.30 is: 592,363.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,629.80 : 990,944.70 = 394,909.30 : x
  2. Step 2: Convert to fraction form
    660,629.80/990,944.70 = 394,909.30/x
  3. Step 3: Cross multiply
    660,629.80x = 990,944.70 × 394,909.30
  4. Step 4: Simplify right side
    660,629.80x = 391,333,277,815.71
  5. Step 5: Solve for x
    x = 391,333,277,815.71/660,629.80
  6. Step 6: Final answer
    x = 592,363.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.