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Finding the Fourth Proportional to 319,645.20, 478,884.60 and 260,158.80

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Solution

The fourth proportional to 319,645.20, 478,884.60 and 260,158.80 is: 389,763.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,645.20 : 478,884.60 = 260,158.80 : x
  2. Step 2: Convert to fraction form
    319,645.20/478,884.60 = 260,158.80/x
  3. Step 3: Cross multiply
    319,645.20x = 478,884.60 × 260,158.80
  4. Step 4: Simplify right side
    319,645.20x = 124,586,042,874.48
  5. Step 5: Solve for x
    x = 124,586,042,874.48/319,645.20
  6. Step 6: Final answer
    x = 389,763.53

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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.