Home / 390,561.23-538,949.07-218,449.40

Finding the Fourth Proportional to 390,561.23, 538,949.07 and 218,449.40

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Solution

The fourth proportional to 390,561.23, 538,949.07 and 218,449.40 is: 301,445.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,561.23 : 538,949.07 = 218,449.40 : x
  2. Step 2: Convert to fraction form
    390,561.23/538,949.07 = 218,449.40/x
  3. Step 3: Cross multiply
    390,561.23x = 538,949.07 × 218,449.40
  4. Step 4: Simplify right side
    390,561.23x = 117,733,098,277.31
  5. Step 5: Solve for x
    x = 117,733,098,277.31/390,561.23
  6. Step 6: Final answer
    x = 301,445.94

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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.