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Finding the Fourth Proportional to 274,330.40, 378,610.80 and 153,478.40

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Solution

The fourth proportional to 274,330.40, 378,610.80 and 153,478.40 is: 211,819.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,330.40 : 378,610.80 = 153,478.40 : x
  2. Step 2: Convert to fraction form
    274,330.40/378,610.80 = 153,478.40/x
  3. Step 3: Cross multiply
    274,330.40x = 378,610.80 × 153,478.40
  4. Step 4: Simplify right side
    274,330.40x = 58,108,579,806.72
  5. Step 5: Solve for x
    x = 58,108,579,806.72/274,330.40
  6. Step 6: Final answer
    x = 211,819.69

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1.5x scale

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.