Home / 800,870.20-1,105,091.78-478,512.20

Finding the Fourth Proportional to 800,870.20, 1,105,091.78 and 478,512.20

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Solution

The fourth proportional to 800,870.20, 1,105,091.78 and 478,512.20 is: 660,281.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,870.20 : 1,105,091.78 = 478,512.20 : x
  2. Step 2: Convert to fraction form
    800,870.20/1,105,091.78 = 478,512.20/x
  3. Step 3: Cross multiply
    800,870.20x = 1,105,091.78 × 478,512.20
  4. Step 4: Simplify right side
    800,870.20x = 528,799,898,849.72
  5. Step 5: Solve for x
    x = 528,799,898,849.72/800,870.20
  6. Step 6: Final answer
    x = 660,281.65

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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.