Home / 425,909,480.40-638,612,278.20-221,836,136.40

Finding the Fourth Proportional to 425,909,480.40, 638,612,278.20 and 221,836,136.40

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Solution

The fourth proportional to 425,909,480.40, 638,612,278.20 and 221,836,136.40 is: 332,622,979.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,909,480.40 : 638,612,278.20 = 221,836,136.40 : x
  2. Step 2: Convert to fraction form
    425,909,480.40/638,612,278.20 = 221,836,136.40/x
  3. Step 3: Cross multiply
    425,909,480.40x = 638,612,278.20 × 221,836,136.40
  4. Step 4: Simplify right side
    425,909,480.40x = 141,667,280,453,489,968
  5. Step 5: Solve for x
    x = 141,667,280,453,489,968/425,909,480.40
  6. Step 6: Final answer
    x = 332,622,979.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.