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Finding the Fourth Proportional to 660,540.40, 990,810.60 and 432,217.60

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Solution

The fourth proportional to 660,540.40, 990,810.60 and 432,217.60 is: 648,326.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,540.40 : 990,810.60 = 432,217.60 : x
  2. Step 2: Convert to fraction form
    660,540.40/990,810.60 = 432,217.60/x
  3. Step 3: Cross multiply
    660,540.40x = 990,810.60 × 432,217.60
  4. Step 4: Simplify right side
    660,540.40x = 428,245,779,586.56
  5. Step 5: Solve for x
    x = 428,245,779,586.56/660,540.40
  6. Step 6: Final answer
    x = 648,326.40

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Similar ratio
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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.