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Finding the Fourth Proportional to 496,640.60, 744,960.90 and 390,352.40

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Solution

The fourth proportional to 496,640.60, 744,960.90 and 390,352.40 is: 585,528.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,640.60 : 744,960.90 = 390,352.40 : x
  2. Step 2: Convert to fraction form
    496,640.60/744,960.90 = 390,352.40/x
  3. Step 3: Cross multiply
    496,640.60x = 744,960.90 × 390,352.40
  4. Step 4: Simplify right side
    496,640.60x = 290,797,275,221.16
  5. Step 5: Solve for x
    x = 290,797,275,221.16/496,640.60
  6. Step 6: Final answer
    x = 585,528.60

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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.