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Finding the Fourth Proportional to 680,698.40, 939,348.24 and 426,189.92

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Solution

The fourth proportional to 680,698.40, 939,348.24 and 426,189.92 is: 588,132.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,698.40 : 939,348.24 = 426,189.92 : x
  2. Step 2: Convert to fraction form
    680,698.40/939,348.24 = 426,189.92/x
  3. Step 3: Cross multiply
    680,698.40x = 939,348.24 × 426,189.92
  4. Step 4: Simplify right side
    680,698.40x = 400,340,751,257.74
  5. Step 5: Solve for x
    x = 400,340,751,257.74/680,698.40
  6. Step 6: Final answer
    x = 588,132.35

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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.