Home / 390,351.56-538,678.15-220,582.04

Finding the Fourth Proportional to 390,351.56, 538,678.15 and 220,582.04

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Solution

The fourth proportional to 390,351.56, 538,678.15 and 220,582.04 is: 304,399.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,351.56 : 538,678.15 = 220,582.04 : x
  2. Step 2: Convert to fraction form
    390,351.56/538,678.15 = 220,582.04/x
  3. Step 3: Cross multiply
    390,351.56x = 538,678.15 × 220,582.04
  4. Step 4: Simplify right side
    390,351.56x = 118,822,721,985.58
  5. Step 5: Solve for x
    x = 118,822,721,985.58/390,351.56
  6. Step 6: Final answer
    x = 304,399.25

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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.