Home / 1,288,288.80-1,932,651.90-389,723.40

Finding the Fourth Proportional to 1,288,288.80, 1,932,651.90 and 389,723.40

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Solution

The fourth proportional to 1,288,288.80, 1,932,651.90 and 389,723.40 is: 584,651.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,288.80 : 1,932,651.90 = 389,723.40 : x
  2. Step 2: Convert to fraction form
    1,288,288.80/1,932,651.90 = 389,723.40/x
  3. Step 3: Cross multiply
    1,288,288.80x = 1,932,651.90 × 389,723.40
  4. Step 4: Simplify right side
    1,288,288.80x = 753,199,669,484.46
  5. Step 5: Solve for x
    x = 753,199,669,484.46/1,288,288.80
  6. Step 6: Final answer
    x = 584,651.26

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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.