Home / 389,985.78-538,146.98-224,419.11

Finding the Fourth Proportional to 389,985.78, 538,146.98 and 224,419.11

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Solution

The fourth proportional to 389,985.78, 538,146.98 and 224,419.11 is: 309,679.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,985.78 : 538,146.98 = 224,419.11 : x
  2. Step 2: Convert to fraction form
    389,985.78/538,146.98 = 224,419.11/x
  3. Step 3: Cross multiply
    389,985.78x = 538,146.98 × 224,419.11
  4. Step 4: Simplify right side
    389,985.78x = 120,770,465,178.69
  5. Step 5: Solve for x
    x = 120,770,465,178.69/389,985.78
  6. Step 6: Final answer
    x = 309,679.15

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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.