Home / 708,481.38-1,058,206.78-640,909.46

Finding the Fourth Proportional to 708,481.38, 1,058,206.78 and 640,909.46

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Solution

The fourth proportional to 708,481.38, 1,058,206.78 and 640,909.46 is: 957,279.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,481.38 : 1,058,206.78 = 640,909.46 : x
  2. Step 2: Convert to fraction form
    708,481.38/1,058,206.78 = 640,909.46/x
  3. Step 3: Cross multiply
    708,481.38x = 1,058,206.78 × 640,909.46
  4. Step 4: Simplify right side
    708,481.38x = 678,214,735,938.14
  5. Step 5: Solve for x
    x = 678,214,735,938.14/708,481.38
  6. Step 6: Final answer
    x = 957,279.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.