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Finding the Fourth Proportional to 709,581, 979,221.78 and 483,621.24

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Solution

The fourth proportional to 709,581, 979,221.78 and 483,621.24 is: 667,397.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,581 : 979,221.78 = 483,621.24 : x
  2. Step 2: Convert to fraction form
    709,581/979,221.78 = 483,621.24/x
  3. Step 3: Cross multiply
    709,581x = 979,221.78 × 483,621.24
  4. Step 4: Simplify right side
    709,581x = 473,572,451,478.61
  5. Step 5: Solve for x
    x = 473,572,451,478.61/709,581
  6. Step 6: Final answer
    x = 667,397.31

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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.