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Finding the Fourth Proportional to 478,009.78, 659,649.90 and 263,153.50

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Solution

The fourth proportional to 478,009.78, 659,649.90 and 263,153.50 is: 363,149.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,009.78 : 659,649.90 = 263,153.50 : x
  2. Step 2: Convert to fraction form
    478,009.78/659,649.90 = 263,153.50/x
  3. Step 3: Cross multiply
    478,009.78x = 659,649.90 × 263,153.50
  4. Step 4: Simplify right side
    478,009.78x = 173,589,179,959.65
  5. Step 5: Solve for x
    x = 173,589,179,959.65/478,009.78
  6. Step 6: Final answer
    x = 363,149.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.