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Finding the Fourth Proportional to 421,058.20, 580,995.90 and 239,777.56

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Solution

The fourth proportional to 421,058.20, 580,995.90 and 239,777.56 is: 330,856.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,058.20 : 580,995.90 = 239,777.56 : x
  2. Step 2: Convert to fraction form
    421,058.20/580,995.90 = 239,777.56/x
  3. Step 3: Cross multiply
    421,058.20x = 580,995.90 × 239,777.56
  4. Step 4: Simplify right side
    421,058.20x = 139,309,779,272.00
  5. Step 5: Solve for x
    x = 139,309,779,272.00/421,058.20
  6. Step 6: Final answer
    x = 330,856.35

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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.