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Finding the Fourth Proportional to 420,049.76, 579,712.41 and 258,900.66

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Solution

The fourth proportional to 420,049.76, 579,712.41 and 258,900.66 is: 357,309.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,049.76 : 579,712.41 = 258,900.66 : x
  2. Step 2: Convert to fraction form
    420,049.76/579,712.41 = 258,900.66/x
  3. Step 3: Cross multiply
    420,049.76x = 579,712.41 × 258,900.66
  4. Step 4: Simplify right side
    420,049.76x = 150,087,925,559.19
  5. Step 5: Solve for x
    x = 150,087,925,559.19/420,049.76
  6. Step 6: Final answer
    x = 357,309.88

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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.