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Finding the Fourth Proportional to 709,463.79, 979,059.76 and 387,173.88

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Solution

The fourth proportional to 709,463.79, 979,059.76 and 387,173.88 is: 534,299.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,463.79 : 979,059.76 = 387,173.88 : x
  2. Step 2: Convert to fraction form
    709,463.79/979,059.76 = 387,173.88/x
  3. Step 3: Cross multiply
    709,463.79x = 979,059.76 × 387,173.88
  4. Step 4: Simplify right side
    709,463.79x = 379,066,364,095.20
  5. Step 5: Solve for x
    x = 379,066,364,095.20/709,463.79
  6. Step 6: Final answer
    x = 534,299.81

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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.