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Finding the Fourth Proportional to 709,472.98, 979,093.45 and 387,203.76

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Solution

The fourth proportional to 709,472.98, 979,093.45 and 387,203.76 is: 534,352.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,472.98 : 979,093.45 = 387,203.76 : x
  2. Step 2: Convert to fraction form
    709,472.98/979,093.45 = 387,203.76/x
  3. Step 3: Cross multiply
    709,472.98x = 979,093.45 × 387,203.76
  4. Step 4: Simplify right side
    709,472.98x = 379,108,665,231.37
  5. Step 5: Solve for x
    x = 379,108,665,231.37/709,472.98
  6. Step 6: Final answer
    x = 534,352.51

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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.