Home / 712,220.56-982,867.24-389,960.65

Finding the Fourth Proportional to 712,220.56, 982,867.24 and 389,960.65

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Solution

The fourth proportional to 712,220.56, 982,867.24 and 389,960.65 is: 538,147.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,220.56 : 982,867.24 = 389,960.65 : x
  2. Step 2: Convert to fraction form
    712,220.56/982,867.24 = 389,960.65/x
  3. Step 3: Cross multiply
    712,220.56x = 982,867.24 × 389,960.65
  4. Step 4: Simplify right side
    712,220.56x = 383,279,547,774.11
  5. Step 5: Solve for x
    x = 383,279,547,774.11/712,220.56
  6. Step 6: Final answer
    x = 538,147.27

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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.