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Finding the Fourth Proportional to 312,579.16, 431,358.72 and 169,342.84

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Solution

The fourth proportional to 312,579.16, 431,358.72 and 169,342.84 is: 233,692.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,579.16 : 431,358.72 = 169,342.84 : x
  2. Step 2: Convert to fraction form
    312,579.16/431,358.72 = 169,342.84/x
  3. Step 3: Cross multiply
    312,579.16x = 431,358.72 × 169,342.84
  4. Step 4: Simplify right side
    312,579.16x = 73,047,510,703.56
  5. Step 5: Solve for x
    x = 73,047,510,703.56/312,579.16
  6. Step 6: Final answer
    x = 233,692.84

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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.