Home / 403,268.50-556,445.40-231,154.78

Finding the Fourth Proportional to 403,268.50, 556,445.40 and 231,154.78

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Solution

The fourth proportional to 403,268.50, 556,445.40 and 231,154.78 is: 318,956.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,268.50 : 556,445.40 = 231,154.78 : x
  2. Step 2: Convert to fraction form
    403,268.50/556,445.40 = 231,154.78/x
  3. Step 3: Cross multiply
    403,268.50x = 556,445.40 × 231,154.78
  4. Step 4: Simplify right side
    403,268.50x = 128,625,016,835.86
  5. Step 5: Solve for x
    x = 128,625,016,835.86/403,268.50
  6. Step 6: Final answer
    x = 318,956.27

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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.