Home / 687,147.36-948,069.54-445,440.12

Finding the Fourth Proportional to 687,147.36, 948,069.54 and 445,440.12

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Solution

The fourth proportional to 687,147.36, 948,069.54 and 445,440.12 is: 614,581.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,147.36 : 948,069.54 = 445,440.12 : x
  2. Step 2: Convert to fraction form
    687,147.36/948,069.54 = 445,440.12/x
  3. Step 3: Cross multiply
    687,147.36x = 948,069.54 × 445,440.12
  4. Step 4: Simplify right side
    687,147.36x = 422,308,209,665.95
  5. Step 5: Solve for x
    x = 422,308,209,665.95/687,147.36
  6. Step 6: Final answer
    x = 614,581.72

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Double scale
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Similar ratio
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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.