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Finding the Fourth Proportional to 667,643.10, 1,001,464.65 and 660,644.70

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Solution

The fourth proportional to 667,643.10, 1,001,464.65 and 660,644.70 is: 990,967.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,643.10 : 1,001,464.65 = 660,644.70 : x
  2. Step 2: Convert to fraction form
    667,643.10/1,001,464.65 = 660,644.70/x
  3. Step 3: Cross multiply
    667,643.10x = 1,001,464.65 × 660,644.70
  4. Step 4: Simplify right side
    667,643.10x = 661,612,313,259.86
  5. Step 5: Solve for x
    x = 661,612,313,259.86/667,643.10
  6. Step 6: Final answer
    x = 990,967.05

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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.