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Finding the Fourth Proportional to 571,390.40, 857,085.60 and 172,092.80

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Solution

The fourth proportional to 571,390.40, 857,085.60 and 172,092.80 is: 258,139.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,390.40 : 857,085.60 = 172,092.80 : x
  2. Step 2: Convert to fraction form
    571,390.40/857,085.60 = 172,092.80/x
  3. Step 3: Cross multiply
    571,390.40x = 857,085.60 × 172,092.80
  4. Step 4: Simplify right side
    571,390.40x = 147,498,260,743.68
  5. Step 5: Solve for x
    x = 147,498,260,743.68/571,390.40
  6. Step 6: Final answer
    x = 258,139.20

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Similar ratio
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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.