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Finding the Fourth Proportional to 709,475.45, 979,096.86 and 387,206.21

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Solution

The fourth proportional to 709,475.45, 979,096.86 and 387,206.21 is: 534,355.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,475.45 : 979,096.86 = 387,206.21 : x
  2. Step 2: Convert to fraction form
    709,475.45/979,096.86 = 387,206.21/x
  3. Step 3: Cross multiply
    709,475.45x = 979,096.86 × 387,206.21
  4. Step 4: Simplify right side
    709,475.45x = 379,112,379,488.02
  5. Step 5: Solve for x
    x = 379,112,379,488.02/709,475.45
  6. Step 6: Final answer
    x = 534,355.89

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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.