Home / 1,187,143.72-1,779,928.26-388,145.32

Finding the Fourth Proportional to 1,187,143.72, 1,779,928.26 and 388,145.32

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Solution

The fourth proportional to 1,187,143.72, 1,779,928.26 and 388,145.32 is: 581,960.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,143.72 : 1,779,928.26 = 388,145.32 : x
  2. Step 2: Convert to fraction form
    1,187,143.72/1,779,928.26 = 388,145.32/x
  3. Step 3: Cross multiply
    1,187,143.72x = 1,779,928.26 × 388,145.32
  4. Step 4: Simplify right side
    1,187,143.72x = 690,870,824,054.74
  5. Step 5: Solve for x
    x = 690,870,824,054.74/1,187,143.72
  6. Step 6: Final answer
    x = 581,960.56

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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.