Home / 990,985.77-1,486,487.42-391,947

Finding the Fourth Proportional to 990,985.77, 1,486,487.42 and 391,947

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Solution

The fourth proportional to 990,985.77, 1,486,487.42 and 391,947 is: 587,923.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,985.77 : 1,486,487.42 = 391,947 : x
  2. Step 2: Convert to fraction form
    990,985.77/1,486,487.42 = 391,947/x
  3. Step 3: Cross multiply
    990,985.77x = 1,486,487.42 × 391,947
  4. Step 4: Simplify right side
    990,985.77x = 582,624,282,847.01
  5. Step 5: Solve for x
    x = 582,624,282,847.01/990,985.77
  6. Step 6: Final answer
    x = 587,923.96

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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.