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Finding the Fourth Proportional to 691,803.14, 954,542.50 and 420,013.94

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Solution

The fourth proportional to 691,803.14, 954,542.50 and 420,013.94 is: 579,530.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,803.14 : 954,542.50 = 420,013.94 : x
  2. Step 2: Convert to fraction form
    691,803.14/954,542.50 = 420,013.94/x
  3. Step 3: Cross multiply
    691,803.14x = 954,542.50 × 420,013.94
  4. Step 4: Simplify right side
    691,803.14x = 400,921,150,499.70
  5. Step 5: Solve for x
    x = 400,921,150,499.70/691,803.14
  6. Step 6: Final answer
    x = 579,530.69

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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.