Home / 390,282.18-538,582.41-220,512.66

Finding the Fourth Proportional to 390,282.18, 538,582.41 and 220,512.66

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Solution

The fourth proportional to 390,282.18, 538,582.41 and 220,512.66 is: 304,303.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,282.18 : 538,582.41 = 220,512.66 : x
  2. Step 2: Convert to fraction form
    390,282.18/538,582.41 = 220,512.66/x
  3. Step 3: Cross multiply
    390,282.18x = 538,582.41 × 220,512.66
  4. Step 4: Simplify right side
    390,282.18x = 118,764,239,858.31
  5. Step 5: Solve for x
    x = 118,764,239,858.31/390,282.18
  6. Step 6: Final answer
    x = 304,303.52

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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.