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Finding the Fourth Proportional to 683,940.10, 943,886.20 and 378,009.90

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Solution

The fourth proportional to 683,940.10, 943,886.20 and 378,009.90 is: 521,680.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    683,940.10 : 943,886.20 = 378,009.90 : x
  2. Step 2: Convert to fraction form
    683,940.10/943,886.20 = 378,009.90/x
  3. Step 3: Cross multiply
    683,940.10x = 943,886.20 × 378,009.90
  4. Step 4: Simplify right side
    683,940.10x = 356,798,328,073.38
  5. Step 5: Solve for x
    x = 356,798,328,073.38/683,940.10
  6. Step 6: Final answer
    x = 521,680.67

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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.