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Finding the Fourth Proportional to 709,191.16, 978,679.16 and 403,267.56

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Solution

The fourth proportional to 709,191.16, 978,679.16 and 403,267.56 is: 556,506.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,191.16 : 978,679.16 = 403,267.56 : x
  2. Step 2: Convert to fraction form
    709,191.16/978,679.16 = 403,267.56/x
  3. Step 3: Cross multiply
    709,191.16x = 978,679.16 × 403,267.56
  4. Step 4: Simplify right side
    709,191.16x = 394,669,556,876.05
  5. Step 5: Solve for x
    x = 394,669,556,876.05/709,191.16
  6. Step 6: Final answer
    x = 556,506.59

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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.