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Finding the Fourth Proportional to 319,426.40, 478,966.80 and 132,456.80

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Solution

The fourth proportional to 319,426.40, 478,966.80 and 132,456.80 is: 198,613.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,426.40 : 478,966.80 = 132,456.80 : x
  2. Step 2: Convert to fraction form
    319,426.40/478,966.80 = 132,456.80/x
  3. Step 3: Cross multiply
    319,426.40x = 478,966.80 × 132,456.80
  4. Step 4: Simplify right side
    319,426.40x = 63,442,409,634.24
  5. Step 5: Solve for x
    x = 63,442,409,634.24/319,426.40
  6. Step 6: Final answer
    x = 198,613.54

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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.