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Finding the Fourth Proportional to 709,023.69, 978,452.68 and 386,733.79

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Solution

The fourth proportional to 709,023.69, 978,452.68 and 386,733.79 is: 533,692.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,023.69 : 978,452.68 = 386,733.79 : x
  2. Step 2: Convert to fraction form
    709,023.69/978,452.68 = 386,733.79/x
  3. Step 3: Cross multiply
    709,023.69x = 978,452.68 × 386,733.79
  4. Step 4: Simplify right side
    709,023.69x = 378,400,708,379.79
  5. Step 5: Solve for x
    x = 378,400,708,379.79/709,023.69
  6. Step 6: Final answer
    x = 533,692.62

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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.