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Finding the Fourth Proportional to 390,995.70, 539,702.37 and 229,842.96

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Solution

The fourth proportional to 390,995.70, 539,702.37 and 229,842.96 is: 317,258.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,995.70 : 539,702.37 = 229,842.96 : x
  2. Step 2: Convert to fraction form
    390,995.70/539,702.37 = 229,842.96/x
  3. Step 3: Cross multiply
    390,995.70x = 539,702.37 × 229,842.96
  4. Step 4: Simplify right side
    390,995.70x = 124,046,790,239.82
  5. Step 5: Solve for x
    x = 124,046,790,239.82/390,995.70
  6. Step 6: Final answer
    x = 317,258.71

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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.