Home / 687,447.28-948,791.27-400,967.36

Finding the Fourth Proportional to 687,447.28, 948,791.27 and 400,967.36

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Solution

The fourth proportional to 687,447.28, 948,791.27 and 400,967.36 is: 553,401.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,447.28 : 948,791.27 = 400,967.36 : x
  2. Step 2: Convert to fraction form
    687,447.28/948,791.27 = 400,967.36/x
  3. Step 3: Cross multiply
    687,447.28x = 948,791.27 × 400,967.36
  4. Step 4: Simplify right side
    687,447.28x = 380,434,323,974.15
  5. Step 5: Solve for x
    x = 380,434,323,974.15/687,447.28
  6. Step 6: Final answer
    x = 553,401.46

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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.