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Finding the Fourth Proportional to 319,810.80, 480,023.40 and 162,217.20

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Solution

The fourth proportional to 319,810.80, 480,023.40 and 162,217.20 is: 243,481.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,810.80 : 480,023.40 = 162,217.20 : x
  2. Step 2: Convert to fraction form
    319,810.80/480,023.40 = 162,217.20/x
  3. Step 3: Cross multiply
    319,810.80x = 480,023.40 × 162,217.20
  4. Step 4: Simplify right side
    319,810.80x = 77,868,051,882.48
  5. Step 5: Solve for x
    x = 77,868,051,882.48/319,810.80
  6. Step 6: Final answer
    x = 243,481.62

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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.