Home / 684,778.20-945,021.76-378,849.30

Finding the Fourth Proportional to 684,778.20, 945,021.76 and 378,849.30

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Solution

The fourth proportional to 684,778.20, 945,021.76 and 378,849.30 is: 522,827.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,778.20 : 945,021.76 = 378,849.30 : x
  2. Step 2: Convert to fraction form
    684,778.20/945,021.76 = 378,849.30/x
  3. Step 3: Cross multiply
    684,778.20x = 945,021.76 × 378,849.30
  4. Step 4: Simplify right side
    684,778.20x = 358,020,832,260.77
  5. Step 5: Solve for x
    x = 358,020,832,260.77/684,778.20
  6. Step 6: Final answer
    x = 522,827.44

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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.