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Finding the Fourth Proportional to 478,932.80, 719,176.80 and 321,857.60

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Solution

The fourth proportional to 478,932.80, 719,176.80 and 321,857.60 is: 483,308.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,932.80 : 719,176.80 = 321,857.60 : x
  2. Step 2: Convert to fraction form
    478,932.80/719,176.80 = 321,857.60/x
  3. Step 3: Cross multiply
    478,932.80x = 719,176.80 × 321,857.60
  4. Step 4: Simplify right side
    478,932.80x = 231,472,518,823.68
  5. Step 5: Solve for x
    x = 231,472,518,823.68/478,932.80
  6. Step 6: Final answer
    x = 483,308.97

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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.