Home / 853,138.20-1,177,400.34-490,679.40

Finding the Fourth Proportional to 853,138.20, 1,177,400.34 and 490,679.40

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Solution

The fourth proportional to 853,138.20, 1,177,400.34 and 490,679.40 is: 677,177.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,138.20 : 1,177,400.34 = 490,679.40 : x
  2. Step 2: Convert to fraction form
    853,138.20/1,177,400.34 = 490,679.40/x
  3. Step 3: Cross multiply
    853,138.20x = 1,177,400.34 × 490,679.40
  4. Step 4: Simplify right side
    853,138.20x = 577,726,092,391.00
  5. Step 5: Solve for x
    x = 577,726,092,391.00/853,138.20
  6. Step 6: Final answer
    x = 677,177.62

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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.