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Finding the Fourth Proportional to 667,641.60, 1,001,462.40 and 660,643.20

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Solution

The fourth proportional to 667,641.60, 1,001,462.40 and 660,643.20 is: 990,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,641.60 : 1,001,462.40 = 660,643.20 : x
  2. Step 2: Convert to fraction form
    667,641.60/1,001,462.40 = 660,643.20/x
  3. Step 3: Cross multiply
    667,641.60x = 1,001,462.40 × 660,643.20
  4. Step 4: Simplify right side
    667,641.60x = 661,609,324,615.68
  5. Step 5: Solve for x
    x = 661,609,324,615.68/667,641.60
  6. Step 6: Final answer
    x = 990,964.80

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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.