Home / 1,287,399.34-1,931,279.51-388,739.17

Finding the Fourth Proportional to 1,287,399.34, 1,931,279.51 and 388,739.17

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Solution

The fourth proportional to 1,287,399.34, 1,931,279.51 and 388,739.17 is: 583,163.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,399.34 : 1,931,279.51 = 388,739.17 : x
  2. Step 2: Convert to fraction form
    1,287,399.34/1,931,279.51 = 388,739.17/x
  3. Step 3: Cross multiply
    1,287,399.34x = 1,931,279.51 × 388,739.17
  4. Step 4: Simplify right side
    1,287,399.34x = 750,763,993,755.41
  5. Step 5: Solve for x
    x = 750,763,993,755.41/1,287,399.34
  6. Step 6: Final answer
    x = 583,163.26

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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.