Home / 715,776.26-987,790.13-389,111.24

Finding the Fourth Proportional to 715,776.26, 987,790.13 and 389,111.24

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Solution

The fourth proportional to 715,776.26, 987,790.13 and 389,111.24 is: 536,983.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,776.26 : 987,790.13 = 389,111.24 : x
  2. Step 2: Convert to fraction form
    715,776.26/987,790.13 = 389,111.24/x
  3. Step 3: Cross multiply
    715,776.26x = 987,790.13 × 389,111.24
  4. Step 4: Simplify right side
    715,776.26x = 384,360,244,327.15
  5. Step 5: Solve for x
    x = 384,360,244,327.15/715,776.26
  6. Step 6: Final answer
    x = 536,983.79

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Double scale
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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.