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Finding the Fourth Proportional to 404,840, 558,728.40 and 235,074.12

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Solution

The fourth proportional to 404,840, 558,728.40 and 235,074.12 is: 324,430.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,840 : 558,728.40 = 235,074.12 : x
  2. Step 2: Convert to fraction form
    404,840/558,728.40 = 235,074.12/x
  3. Step 3: Cross multiply
    404,840x = 558,728.40 × 235,074.12
  4. Step 4: Simplify right side
    404,840x = 131,342,586,949.01
  5. Step 5: Solve for x
    x = 131,342,586,949.01/404,840
  6. Step 6: Final answer
    x = 324,430.85

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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.