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Finding the Fourth Proportional to 709,698.30, 979,346.26 and 387,345.84

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Solution

The fourth proportional to 709,698.30, 979,346.26 and 387,345.84 is: 534,516.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,698.30 : 979,346.26 = 387,345.84 : x
  2. Step 2: Convert to fraction form
    709,698.30/979,346.26 = 387,345.84/x
  3. Step 3: Cross multiply
    709,698.30x = 979,346.26 × 387,345.84
  4. Step 4: Simplify right side
    709,698.30x = 379,345,699,730.56
  5. Step 5: Solve for x
    x = 379,345,699,730.56/709,698.30
  6. Step 6: Final answer
    x = 534,516.85

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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.