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Finding the Fourth Proportional to 709,896.92, 979,671.39 and 387,619.79

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Solution

The fourth proportional to 709,896.92, 979,671.39 and 387,619.79 is: 534,922.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,896.92 : 979,671.39 = 387,619.79 : x
  2. Step 2: Convert to fraction form
    709,896.92/979,671.39 = 387,619.79/x
  3. Step 3: Cross multiply
    709,896.92x = 979,671.39 × 387,619.79
  4. Step 4: Simplify right side
    709,896.92x = 379,740,018,460.81
  5. Step 5: Solve for x
    x = 379,740,018,460.81/709,896.92
  6. Step 6: Final answer
    x = 534,922.76

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1.5x scale

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.