Home / 390,943.27-539,498.06-221,177.39

Finding the Fourth Proportional to 390,943.27, 539,498.06 and 221,177.39

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Solution

The fourth proportional to 390,943.27, 539,498.06 and 221,177.39 is: 305,222.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,943.27 : 539,498.06 = 221,177.39 : x
  2. Step 2: Convert to fraction form
    390,943.27/539,498.06 = 221,177.39/x
  3. Step 3: Cross multiply
    390,943.27x = 539,498.06 × 221,177.39
  4. Step 4: Simplify right side
    390,943.27x = 119,324,772,881.58
  5. Step 5: Solve for x
    x = 119,324,772,881.58/390,943.27
  6. Step 6: Final answer
    x = 305,222.74

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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.