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Finding the Fourth Proportional to 319,003.60, 479,218.20 and 266,515.60

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Solution

The fourth proportional to 319,003.60, 479,218.20 and 266,515.60 is: 400,368.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,003.60 : 479,218.20 = 266,515.60 : x
  2. Step 2: Convert to fraction form
    319,003.60/479,218.20 = 266,515.60/x
  3. Step 3: Cross multiply
    319,003.60x = 479,218.20 × 266,515.60
  4. Step 4: Simplify right side
    319,003.60x = 127,719,126,103.92
  5. Step 5: Solve for x
    x = 127,719,126,103.92/319,003.60
  6. Step 6: Final answer
    x = 400,368.92

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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.