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Finding the Fourth Proportional to 709,595.79, 979,241.87 and 387,305.86

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Solution

The fourth proportional to 709,595.79, 979,241.87 and 387,305.86 is: 534,481.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,595.79 : 979,241.87 = 387,305.86 : x
  2. Step 2: Convert to fraction form
    709,595.79/979,241.87 = 387,305.86/x
  3. Step 3: Cross multiply
    709,595.79x = 979,241.87 × 387,305.86
  4. Step 4: Simplify right side
    709,595.79x = 379,266,114,608.36
  5. Step 5: Solve for x
    x = 379,266,114,608.36/709,595.79
  6. Step 6: Final answer
    x = 534,481.91

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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.