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Finding the Fourth Proportional to 554,185.20, 764,760.24 and 312,465.63

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Solution

The fourth proportional to 554,185.20, 764,760.24 and 312,465.63 is: 431,193.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,185.20 : 764,760.24 = 312,465.63 : x
  2. Step 2: Convert to fraction form
    554,185.20/764,760.24 = 312,465.63/x
  3. Step 3: Cross multiply
    554,185.20x = 764,760.24 × 312,465.63
  4. Step 4: Simplify right side
    554,185.20x = 238,961,290,190.55
  5. Step 5: Solve for x
    x = 238,961,290,190.55/554,185.20
  6. Step 6: Final answer
    x = 431,193.92

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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.