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Finding the Fourth Proportional to 668,649.90, 1,003,127.84 and 289,633.74

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Solution

The fourth proportional to 668,649.90, 1,003,127.84 and 289,633.74 is: 434,516.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,649.90 : 1,003,127.84 = 289,633.74 : x
  2. Step 2: Convert to fraction form
    668,649.90/1,003,127.84 = 289,633.74/x
  3. Step 3: Cross multiply
    668,649.90x = 1,003,127.84 × 289,633.74
  4. Step 4: Simplify right side
    668,649.90x = 290,539,667,997.32
  5. Step 5: Solve for x
    x = 290,539,667,997.32/668,649.90
  6. Step 6: Final answer
    x = 434,516.88

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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.