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Finding the Fourth Proportional to 406,313.15, 560,433.65 and 278,767.31

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Solution

The fourth proportional to 406,313.15, 560,433.65 and 278,767.31 is: 384,507.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,313.15 : 560,433.65 = 278,767.31 : x
  2. Step 2: Convert to fraction form
    406,313.15/560,433.65 = 278,767.31/x
  3. Step 3: Cross multiply
    406,313.15x = 560,433.65 × 278,767.31
  4. Step 4: Simplify right side
    406,313.15x = 156,230,576,847.98
  5. Step 5: Solve for x
    x = 156,230,576,847.98/406,313.15
  6. Step 6: Final answer
    x = 384,507.81

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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.