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Finding the Fourth Proportional to 420,150.54, 579,856.76 and 238,889.63

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Solution

The fourth proportional to 420,150.54, 579,856.76 and 238,889.63 is: 329,695.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,150.54 : 579,856.76 = 238,889.63 : x
  2. Step 2: Convert to fraction form
    420,150.54/579,856.76 = 238,889.63/x
  3. Step 3: Cross multiply
    420,150.54x = 579,856.76 × 238,889.63
  4. Step 4: Simplify right side
    420,150.54x = 138,521,766,849.40
  5. Step 5: Solve for x
    x = 138,521,766,849.40/420,150.54
  6. Step 6: Final answer
    x = 329,695.56

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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.