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Finding the Fourth Proportional to 571,009.40, 856,514.10 and 171,711.80

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Solution

The fourth proportional to 571,009.40, 856,514.10 and 171,711.80 is: 257,567.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,009.40 : 856,514.10 = 171,711.80 : x
  2. Step 2: Convert to fraction form
    571,009.40/856,514.10 = 171,711.80/x
  3. Step 3: Cross multiply
    571,009.40x = 856,514.10 × 171,711.80
  4. Step 4: Simplify right side
    571,009.40x = 147,073,577,836.38
  5. Step 5: Solve for x
    x = 147,073,577,836.38/571,009.40
  6. Step 6: Final answer
    x = 257,567.70

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Double scale
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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.