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Finding the Fourth Proportional to 319,449.54, 478,801.71 and 240,309.30

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Solution

The fourth proportional to 319,449.54, 478,801.71 and 240,309.30 is: 360,183.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,449.54 : 478,801.71 = 240,309.30 : x
  2. Step 2: Convert to fraction form
    319,449.54/478,801.71 = 240,309.30/x
  3. Step 3: Cross multiply
    319,449.54x = 478,801.71 × 240,309.30
  4. Step 4: Simplify right side
    319,449.54x = 115,060,503,768.90
  5. Step 5: Solve for x
    x = 115,060,503,768.90/319,449.54
  6. Step 6: Final answer
    x = 360,183.66

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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.