Home / 390,497.32-538,865.22-220,721.32

Finding the Fourth Proportional to 390,497.32, 538,865.22 and 220,721.32

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Solution

The fourth proportional to 390,497.32, 538,865.22 and 220,721.32 is: 304,583.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,497.32 : 538,865.22 = 220,721.32 : x
  2. Step 2: Convert to fraction form
    390,497.32/538,865.22 = 220,721.32/x
  3. Step 3: Cross multiply
    390,497.32x = 538,865.22 × 220,721.32
  4. Step 4: Simplify right side
    390,497.32x = 118,939,042,660.49
  5. Step 5: Solve for x
    x = 118,939,042,660.49/390,497.32
  6. Step 6: Final answer
    x = 304,583.51

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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.