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Finding the Fourth Proportional to 425,819,259.60, 638,728,889.40 and 289,770,363.60

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Solution

The fourth proportional to 425,819,259.60, 638,728,889.40 and 289,770,363.60 is: 434,655,545.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,819,259.60 : 638,728,889.40 = 289,770,363.60 : x
  2. Step 2: Convert to fraction form
    425,819,259.60/638,728,889.40 = 289,770,363.60/x
  3. Step 3: Cross multiply
    425,819,259.60x = 638,728,889.40 × 289,770,363.60
  4. Step 4: Simplify right side
    425,819,259.60x = 185,084,702,523,262,208
  5. Step 5: Solve for x
    x = 185,084,702,523,262,208/425,819,259.60
  6. Step 6: Final answer
    x = 434,655,545.40

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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.