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Finding the Fourth Proportional to 554,157.41, 764,721.92 and 312,437.88

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Solution

The fourth proportional to 554,157.41, 764,721.92 and 312,437.88 is: 431,155.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,157.41 : 764,721.92 = 312,437.88 : x
  2. Step 2: Convert to fraction form
    554,157.41/764,721.92 = 312,437.88/x
  3. Step 3: Cross multiply
    554,157.41x = 764,721.92 × 312,437.88
  4. Step 4: Simplify right side
    554,157.41x = 238,928,096,255.42
  5. Step 5: Solve for x
    x = 238,928,096,255.42/554,157.41
  6. Step 6: Final answer
    x = 431,155.65

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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.