Home / 638,847,101.70-958,270,652.55-420,743,715.30

Finding the Fourth Proportional to 638,847,101.70, 958,270,652.55 and 420,743,715.30

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Solution

The fourth proportional to 638,847,101.70, 958,270,652.55 and 420,743,715.30 is: 631,115,572.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,847,101.70 : 958,270,652.55 = 420,743,715.30 : x
  2. Step 2: Convert to fraction form
    638,847,101.70/958,270,652.55 = 420,743,715.30/x
  3. Step 3: Cross multiply
    638,847,101.70x = 958,270,652.55 × 420,743,715.30
  4. Step 4: Simplify right side
    638,847,101.70x = 403,186,354,616,842,432
  5. Step 5: Solve for x
    x = 403,186,354,616,842,432/638,847,101.70
  6. Step 6: Final answer
    x = 631,115,572.95

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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.