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Finding the Fourth Proportional to 304,951.18, 420,835.10 and 168,987.40

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Solution

The fourth proportional to 304,951.18, 420,835.10 and 168,987.40 is: 233,203.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,951.18 : 420,835.10 = 168,987.40 : x
  2. Step 2: Convert to fraction form
    304,951.18/420,835.10 = 168,987.40/x
  3. Step 3: Cross multiply
    304,951.18x = 420,835.10 × 168,987.40
  4. Step 4: Simplify right side
    304,951.18x = 71,115,829,437.78
  5. Step 5: Solve for x
    x = 71,115,829,437.78/304,951.18
  6. Step 6: Final answer
    x = 233,203.98

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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.