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Finding the Fourth Proportional to 684,873.70, 945,107.50 and 378,942.10

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Solution

The fourth proportional to 684,873.70, 945,107.50 and 378,942.10 is: 522,930.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,873.70 : 945,107.50 = 378,942.10 : x
  2. Step 2: Convert to fraction form
    684,873.70/945,107.50 = 378,942.10/x
  3. Step 3: Cross multiply
    684,873.70x = 945,107.50 × 378,942.10
  4. Step 4: Simplify right side
    684,873.70x = 358,141,020,775.75
  5. Step 5: Solve for x
    x = 358,141,020,775.75/684,873.70
  6. Step 6: Final answer
    x = 522,930.02

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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.