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Finding the Fourth Proportional to 274,432.40, 378,734.28 and 153,587.60

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Solution

The fourth proportional to 274,432.40, 378,734.28 and 153,587.60 is: 211,960.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,432.40 : 378,734.28 = 153,587.60 : x
  2. Step 2: Convert to fraction form
    274,432.40/378,734.28 = 153,587.60/x
  3. Step 3: Cross multiply
    274,432.40x = 378,734.28 × 153,587.60
  4. Step 4: Simplify right side
    274,432.40x = 58,168,889,102.93
  5. Step 5: Solve for x
    x = 58,168,889,102.93/274,432.40
  6. Step 6: Final answer
    x = 211,960.72

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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.