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Finding the Fourth Proportional to 319,210.80, 478,816.20 and 267,889.20

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Solution

The fourth proportional to 319,210.80, 478,816.20 and 267,889.20 is: 401,833.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,210.80 : 478,816.20 = 267,889.20 : x
  2. Step 2: Convert to fraction form
    319,210.80/478,816.20 = 267,889.20/x
  3. Step 3: Cross multiply
    319,210.80x = 478,816.20 × 267,889.20
  4. Step 4: Simplify right side
    319,210.80x = 128,269,688,765.04
  5. Step 5: Solve for x
    x = 128,269,688,765.04/319,210.80
  6. Step 6: Final answer
    x = 401,833.80

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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.