Home / 687,447.15-948,791.09-400,967.23

Finding the Fourth Proportional to 687,447.15, 948,791.09 and 400,967.23

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Solution

The fourth proportional to 687,447.15, 948,791.09 and 400,967.23 is: 553,401.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,447.15 : 948,791.09 = 400,967.23 : x
  2. Step 2: Convert to fraction form
    687,447.15/948,791.09 = 400,967.23/x
  3. Step 3: Cross multiply
    687,447.15x = 948,791.09 × 400,967.23
  4. Step 4: Simplify right side
    687,447.15x = 380,434,135,205.98
  5. Step 5: Solve for x
    x = 380,434,135,205.98/687,447.15
  6. Step 6: Final answer
    x = 553,401.28

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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.