Home / 660,619.80-990,929.70-394,899.30

Finding the Fourth Proportional to 660,619.80, 990,929.70 and 394,899.30

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Solution

The fourth proportional to 660,619.80, 990,929.70 and 394,899.30 is: 592,348.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,619.80 : 990,929.70 = 394,899.30 : x
  2. Step 2: Convert to fraction form
    660,619.80/990,929.70 = 394,899.30/x
  3. Step 3: Cross multiply
    660,619.80x = 990,929.70 × 394,899.30
  4. Step 4: Simplify right side
    660,619.80x = 391,317,444,879.21
  5. Step 5: Solve for x
    x = 391,317,444,879.21/660,619.80
  6. Step 6: Final answer
    x = 592,348.95

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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.