Home / 830,149.20-1,245,223.80-431,568.45

Finding the Fourth Proportional to 830,149.20, 1,245,223.80 and 431,568.45

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Solution

The fourth proportional to 830,149.20, 1,245,223.80 and 431,568.45 is: 647,352.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,149.20 : 1,245,223.80 = 431,568.45 : x
  2. Step 2: Convert to fraction form
    830,149.20/1,245,223.80 = 431,568.45/x
  3. Step 3: Cross multiply
    830,149.20x = 1,245,223.80 × 431,568.45
  4. Step 4: Simplify right side
    830,149.20x = 537,399,305,269.11
  5. Step 5: Solve for x
    x = 537,399,305,269.11/830,149.20
  6. Step 6: Final answer
    x = 647,352.68

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Double scale
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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.