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Finding the Fourth Proportional to 572,764.92, 789,887.40 and 389,278.32

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Solution

The fourth proportional to 572,764.92, 789,887.40 and 389,278.32 is: 536,845.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,764.92 : 789,887.40 = 389,278.32 : x
  2. Step 2: Convert to fraction form
    572,764.92/789,887.40 = 389,278.32/x
  3. Step 3: Cross multiply
    572,764.92x = 789,887.40 × 389,278.32
  4. Step 4: Simplify right side
    572,764.92x = 307,486,040,061.17
  5. Step 5: Solve for x
    x = 307,486,040,061.17/572,764.92
  6. Step 6: Final answer
    x = 536,845.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.