Home / 389,916.12-538,023.36-220,146.60

Finding the Fourth Proportional to 389,916.12, 538,023.36 and 220,146.60

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Solution

The fourth proportional to 389,916.12, 538,023.36 and 220,146.60 is: 303,767.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,916.12 : 538,023.36 = 220,146.60 : x
  2. Step 2: Convert to fraction form
    389,916.12/538,023.36 = 220,146.60/x
  3. Step 3: Cross multiply
    389,916.12x = 538,023.36 × 220,146.60
  4. Step 4: Simplify right side
    389,916.12x = 118,444,013,424.58
  5. Step 5: Solve for x
    x = 118,444,013,424.58/389,916.12
  6. Step 6: Final answer
    x = 303,767.93

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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.