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Finding the Fourth Proportional to 268,388.25, 370,335.75 and 153,648.78

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Solution

The fourth proportional to 268,388.25, 370,335.75 and 153,648.78 is: 212,012.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,388.25 : 370,335.75 = 153,648.78 : x
  2. Step 2: Convert to fraction form
    268,388.25/370,335.75 = 153,648.78/x
  3. Step 3: Cross multiply
    268,388.25x = 370,335.75 × 153,648.78
  4. Step 4: Simplify right side
    268,388.25x = 56,901,636,177.89
  5. Step 5: Solve for x
    x = 56,901,636,177.89/268,388.25
  6. Step 6: Final answer
    x = 212,012.40

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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.