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Finding the Fourth Proportional to 528,086.60, 789,825.90 and 472,329.80

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Solution

The fourth proportional to 528,086.60, 789,825.90 and 472,329.80 is: 706,433.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,086.60 : 789,825.90 = 472,329.80 : x
  2. Step 2: Convert to fraction form
    528,086.60/789,825.90 = 472,329.80/x
  3. Step 3: Cross multiply
    528,086.60x = 789,825.90 × 472,329.80
  4. Step 4: Simplify right side
    528,086.60x = 373,058,309,381.82
  5. Step 5: Solve for x
    x = 373,058,309,381.82/528,086.60
  6. Step 6: Final answer
    x = 706,433.96

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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.