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Finding the Fourth Proportional to 390,253.23, 538,559.96 and 220,483.71

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Solution

The fourth proportional to 390,253.23, 538,559.96 and 220,483.71 is: 304,273.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,253.23 : 538,559.96 = 220,483.71 : x
  2. Step 2: Convert to fraction form
    390,253.23/538,559.96 = 220,483.71/x
  3. Step 3: Cross multiply
    390,253.23x = 538,559.96 × 220,483.71
  4. Step 4: Simplify right side
    390,253.23x = 118,743,696,935.83
  5. Step 5: Solve for x
    x = 118,743,696,935.83/390,253.23
  6. Step 6: Final answer
    x = 304,273.45

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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.