Home / 399,723.28-551,619.76-218,434.72

Finding the Fourth Proportional to 399,723.28, 551,619.76 and 218,434.72

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Solution

The fourth proportional to 399,723.28, 551,619.76 and 218,434.72 is: 301,440.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,723.28 : 551,619.76 = 218,434.72 : x
  2. Step 2: Convert to fraction form
    399,723.28/551,619.76 = 218,434.72/x
  3. Step 3: Cross multiply
    399,723.28x = 551,619.76 × 218,434.72
  4. Step 4: Simplify right side
    399,723.28x = 120,492,907,822.07
  5. Step 5: Solve for x
    x = 120,492,907,822.07/399,723.28
  6. Step 6: Final answer
    x = 301,440.81

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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.