Home / 990,147.60-1,486,205.55-485,278.65

Finding the Fourth Proportional to 990,147.60, 1,486,205.55 and 485,278.65

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Solution

The fourth proportional to 990,147.60, 1,486,205.55 and 485,278.65 is: 728,400.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,147.60 : 1,486,205.55 = 485,278.65 : x
  2. Step 2: Convert to fraction form
    990,147.60/1,486,205.55 = 485,278.65/x
  3. Step 3: Cross multiply
    990,147.60x = 1,486,205.55 × 485,278.65
  4. Step 4: Simplify right side
    990,147.60x = 721,223,822,926.51
  5. Step 5: Solve for x
    x = 721,223,822,926.51/990,147.60
  6. Step 6: Final answer
    x = 728,400.31

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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.