Home / 1,288,357.80-1,932,755.40-389,792.40

Finding the Fourth Proportional to 1,288,357.80, 1,932,755.40 and 389,792.40

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Solution

The fourth proportional to 1,288,357.80, 1,932,755.40 and 389,792.40 is: 584,754.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,357.80 : 1,932,755.40 = 389,792.40 : x
  2. Step 2: Convert to fraction form
    1,288,357.80/1,932,755.40 = 389,792.40/x
  3. Step 3: Cross multiply
    1,288,357.80x = 1,932,755.40 × 389,792.40
  4. Step 4: Simplify right side
    1,288,357.80x = 753,373,365,978.96
  5. Step 5: Solve for x
    x = 753,373,365,978.96/1,288,357.80
  6. Step 6: Final answer
    x = 584,754.77

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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.