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Finding the Fourth Proportional to 709,908.02, 979,666.89 and 387,616.58

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Solution

The fourth proportional to 709,908.02, 979,666.89 and 387,616.58 is: 534,907.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,908.02 : 979,666.89 = 387,616.58 : x
  2. Step 2: Convert to fraction form
    709,908.02/979,666.89 = 387,616.58/x
  3. Step 3: Cross multiply
    709,908.02x = 979,666.89 × 387,616.58
  4. Step 4: Simplify right side
    709,908.02x = 379,735,129,441.04
  5. Step 5: Solve for x
    x = 379,735,129,441.04/709,908.02
  6. Step 6: Final answer
    x = 534,907.51

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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.