Home / 990,986.77-1,486,488.92-391,948

Finding the Fourth Proportional to 990,986.77, 1,486,488.92 and 391,948

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Solution

The fourth proportional to 990,986.77, 1,486,488.92 and 391,948 is: 587,925.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,986.77 : 1,486,488.92 = 391,948 : x
  2. Step 2: Convert to fraction form
    990,986.77/1,486,488.92 = 391,948/x
  3. Step 3: Cross multiply
    990,986.77x = 1,486,488.92 × 391,948
  4. Step 4: Simplify right side
    990,986.77x = 582,626,359,216.16
  5. Step 5: Solve for x
    x = 582,626,359,216.16/990,986.77
  6. Step 6: Final answer
    x = 587,925.47

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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.