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Finding the Fourth Proportional to 425,736,019.80, 638,604,029.70 and 425,736,019.80

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Solution

The fourth proportional to 425,736,019.80, 638,604,029.70 and 425,736,019.80 is: 638,604,029.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,736,019.80 : 638,604,029.70 = 425,736,019.80 : x
  2. Step 2: Convert to fraction form
    425,736,019.80/638,604,029.70 = 425,736,019.80/x
  3. Step 3: Cross multiply
    425,736,019.80x = 638,604,029.70 × 425,736,019.80
  4. Step 4: Simplify right side
    425,736,019.80x = 271,876,737,832,719,008
  5. Step 5: Solve for x
    x = 271,876,737,832,719,008/425,736,019.80
  6. Step 6: Final answer
    x = 638,604,029.70

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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.