Home / 687,449.29-948,794.03-400,969.36

Finding the Fourth Proportional to 687,449.29, 948,794.03 and 400,969.36

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Solution

The fourth proportional to 687,449.29, 948,794.03 and 400,969.36 is: 553,404.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,449.29 : 948,794.03 = 400,969.36 : x
  2. Step 2: Convert to fraction form
    687,449.29/948,794.03 = 400,969.36/x
  3. Step 3: Cross multiply
    687,449.29x = 948,794.03 × 400,969.36
  4. Step 4: Simplify right side
    687,449.29x = 380,437,328,232.10
  5. Step 5: Solve for x
    x = 380,437,328,232.10/687,449.29
  6. Step 6: Final answer
    x = 553,404.21

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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.