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Finding the Fourth Proportional to 709,896.55, 979,649.80 and 387,605.65

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Solution

The fourth proportional to 709,896.55, 979,649.80 and 387,605.65 is: 534,891.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,896.55 : 979,649.80 = 387,605.65 : x
  2. Step 2: Convert to fraction form
    709,896.55/979,649.80 = 387,605.65/x
  3. Step 3: Cross multiply
    709,896.55x = 979,649.80 × 387,605.65
  4. Step 4: Simplify right side
    709,896.55x = 379,717,797,501.37
  5. Step 5: Solve for x
    x = 379,717,797,501.37/709,896.55
  6. Step 6: Final answer
    x = 534,891.74

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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.