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Finding the Fourth Proportional to 208,313.10, 312,469.65 and 103,337.10

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Solution

The fourth proportional to 208,313.10, 312,469.65 and 103,337.10 is: 155,005.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,313.10 : 312,469.65 = 103,337.10 : x
  2. Step 2: Convert to fraction form
    208,313.10/312,469.65 = 103,337.10/x
  3. Step 3: Cross multiply
    208,313.10x = 312,469.65 × 103,337.10
  4. Step 4: Simplify right side
    208,313.10x = 32,289,707,469.02
  5. Step 5: Solve for x
    x = 32,289,707,469.02/208,313.10
  6. Step 6: Final answer
    x = 155,005.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.