Home / 691,743.20-954,605.60-389,937.20

Finding the Fourth Proportional to 691,743.20, 954,605.60 and 389,937.20

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Solution

The fourth proportional to 691,743.20, 954,605.60 and 389,937.20 is: 538,113.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,743.20 : 954,605.60 = 389,937.20 : x
  2. Step 2: Convert to fraction form
    691,743.20/954,605.60 = 389,937.20/x
  3. Step 3: Cross multiply
    691,743.20x = 954,605.60 × 389,937.20
  4. Step 4: Simplify right side
    691,743.20x = 372,236,228,045.61
  5. Step 5: Solve for x
    x = 372,236,228,045.61/691,743.20
  6. Step 6: Final answer
    x = 538,113.32

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.