Home / 870,990.21-1,201,966.49-489,025.20

Finding the Fourth Proportional to 870,990.21, 1,201,966.49 and 489,025.20

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Solution

The fourth proportional to 870,990.21, 1,201,966.49 and 489,025.20 is: 674,854.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,990.21 : 1,201,966.49 = 489,025.20 : x
  2. Step 2: Convert to fraction form
    870,990.21/1,201,966.49 = 489,025.20/x
  3. Step 3: Cross multiply
    870,990.21x = 1,201,966.49 × 489,025.20
  4. Step 4: Simplify right side
    870,990.21x = 587,791,900,720.42
  5. Step 5: Solve for x
    x = 587,791,900,720.42/870,990.21
  6. Step 6: Final answer
    x = 674,854.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.