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Finding the Fourth Proportional to 608,840.40, 913,260.60 and 431,547.60

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Solution

The fourth proportional to 608,840.40, 913,260.60 and 431,547.60 is: 647,321.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,840.40 : 913,260.60 = 431,547.60 : x
  2. Step 2: Convert to fraction form
    608,840.40/913,260.60 = 431,547.60/x
  3. Step 3: Cross multiply
    608,840.40x = 913,260.60 × 431,547.60
  4. Step 4: Simplify right side
    608,840.40x = 394,115,420,104.56
  5. Step 5: Solve for x
    x = 394,115,420,104.56/608,840.40
  6. Step 6: Final answer
    x = 647,321.40

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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.