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Finding the Fourth Proportional to 709,809.49, 979,538.57 and 387,519.67

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Solution

The fourth proportional to 709,809.49, 979,538.57 and 387,519.67 is: 534,777.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,809.49 : 979,538.57 = 387,519.67 : x
  2. Step 2: Convert to fraction form
    709,809.49/979,538.57 = 387,519.67/x
  3. Step 3: Cross multiply
    709,809.49x = 979,538.57 × 387,519.67
  4. Step 4: Simplify right side
    709,809.49x = 379,590,463,398.67
  5. Step 5: Solve for x
    x = 379,590,463,398.67/709,809.49
  6. Step 6: Final answer
    x = 534,777.95

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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.