Home / 390,927.80-539,476.71-221,161.92

Finding the Fourth Proportional to 390,927.80, 539,476.71 and 221,161.92

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Solution

The fourth proportional to 390,927.80, 539,476.71 and 221,161.92 is: 305,201.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,927.80 : 539,476.71 = 221,161.92 : x
  2. Step 2: Convert to fraction form
    390,927.80/539,476.71 = 221,161.92/x
  3. Step 3: Cross multiply
    390,927.80x = 539,476.71 × 221,161.92
  4. Step 4: Simplify right side
    390,927.80x = 119,311,707,831.28
  5. Step 5: Solve for x
    x = 119,311,707,831.28/390,927.80
  6. Step 6: Final answer
    x = 305,201.39

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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.