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Finding the Fourth Proportional to 709,778.69, 979,509.45 and 387,502.37

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Solution

The fourth proportional to 709,778.69, 979,509.45 and 387,502.37 is: 534,761.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,778.69 : 979,509.45 = 387,502.37 : x
  2. Step 2: Convert to fraction form
    709,778.69/979,509.45 = 387,502.37/x
  3. Step 3: Cross multiply
    709,778.69x = 979,509.45 × 387,502.37
  4. Step 4: Simplify right side
    709,778.69x = 379,562,228,414.85
  5. Step 5: Solve for x
    x = 379,562,228,414.85/709,778.69
  6. Step 6: Final answer
    x = 534,761.38

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Double scale
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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.