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Finding the Fourth Proportional to 309,153.68, 428,814.76 and 300,959.72

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Solution

The fourth proportional to 309,153.68, 428,814.76 and 300,959.72 is: 417,449.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,153.68 : 428,814.76 = 300,959.72 : x
  2. Step 2: Convert to fraction form
    309,153.68/428,814.76 = 300,959.72/x
  3. Step 3: Cross multiply
    309,153.68x = 428,814.76 × 300,959.72
  4. Step 4: Simplify right side
    309,153.68x = 129,055,970,101.47
  5. Step 5: Solve for x
    x = 129,055,970,101.47/309,153.68
  6. Step 6: Final answer
    x = 417,449.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.