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Finding the Fourth Proportional to 709,489.40, 979,098.30 and 387,206.33

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Solution

The fourth proportional to 709,489.40, 979,098.30 and 387,206.33 is: 534,346.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,489.40 : 979,098.30 = 387,206.33 : x
  2. Step 2: Convert to fraction form
    709,489.40/979,098.30 = 387,206.33/x
  3. Step 3: Cross multiply
    709,489.40x = 979,098.30 × 387,206.33
  4. Step 4: Simplify right side
    709,489.40x = 379,113,054,556.75
  5. Step 5: Solve for x
    x = 379,113,054,556.75/709,489.40
  6. Step 6: Final answer
    x = 534,346.33

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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.