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Finding the Fourth Proportional to 709,407.44, 979,003.08 and 387,138.33

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Solution

The fourth proportional to 709,407.44, 979,003.08 and 387,138.33 is: 534,262.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,407.44 : 979,003.08 = 387,138.33 : x
  2. Step 2: Convert to fraction form
    709,407.44/979,003.08 = 387,138.33/x
  3. Step 3: Cross multiply
    709,407.44x = 979,003.08 × 387,138.33
  4. Step 4: Simplify right side
    709,407.44x = 379,009,617,456.06
  5. Step 5: Solve for x
    x = 379,009,617,456.06/709,407.44
  6. Step 6: Final answer
    x = 534,262.26

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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.