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Finding the Fourth Proportional to 693,720.77, 957,488.99 and 421,731

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Solution

The fourth proportional to 693,720.77, 957,488.99 and 421,731 is: 582,082.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,720.77 : 957,488.99 = 421,731 : x
  2. Step 2: Convert to fraction form
    693,720.77/957,488.99 = 421,731/x
  3. Step 3: Cross multiply
    693,720.77x = 957,488.99 × 421,731
  4. Step 4: Simplify right side
    693,720.77x = 403,802,787,133.04
  5. Step 5: Solve for x
    x = 403,802,787,133.04/693,720.77
  6. Step 6: Final answer
    x = 582,082.60

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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.