Home / 390,918.72-539,428.24-218,825.52

Finding the Fourth Proportional to 390,918.72, 539,428.24 and 218,825.52

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Solution

The fourth proportional to 390,918.72, 539,428.24 and 218,825.52 is: 301,957.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,918.72 : 539,428.24 = 218,825.52 : x
  2. Step 2: Convert to fraction form
    390,918.72/539,428.24 = 218,825.52/x
  3. Step 3: Cross multiply
    390,918.72x = 539,428.24 × 218,825.52
  4. Step 4: Simplify right side
    390,918.72x = 118,040,665,120.69
  5. Step 5: Solve for x
    x = 118,040,665,120.69/390,918.72
  6. Step 6: Final answer
    x = 301,957.05

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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.