Home / 390,568.96-538,989.06-229,475.80

Finding the Fourth Proportional to 390,568.96, 538,989.06 and 229,475.80

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Solution

The fourth proportional to 390,568.96, 538,989.06 and 229,475.80 is: 316,678.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,568.96 : 538,989.06 = 229,475.80 : x
  2. Step 2: Convert to fraction form
    390,568.96/538,989.06 = 229,475.80/x
  3. Step 3: Cross multiply
    390,568.96x = 538,989.06 × 229,475.80
  4. Step 4: Simplify right side
    390,568.96x = 123,684,945,734.75
  5. Step 5: Solve for x
    x = 123,684,945,734.75/390,568.96
  6. Step 6: Final answer
    x = 316,678.89

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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.