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Finding the Fourth Proportional to 312,023.70, 437,939.10 and 312,023.70

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Solution

The fourth proportional to 312,023.70, 437,939.10 and 312,023.70 is: 437,939.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,023.70 : 437,939.10 = 312,023.70 : x
  2. Step 2: Convert to fraction form
    312,023.70/437,939.10 = 312,023.70/x
  3. Step 3: Cross multiply
    312,023.70x = 437,939.10 × 312,023.70
  4. Step 4: Simplify right side
    312,023.70x = 136,647,378,356.67
  5. Step 5: Solve for x
    x = 136,647,378,356.67/312,023.70
  6. Step 6: Final answer
    x = 437,939.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.