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Finding the Fourth Proportional to 554,119.13, 764,667.05 and 312,398.21

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Solution

The fourth proportional to 554,119.13, 764,667.05 and 312,398.21 is: 431,099.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,119.13 : 764,667.05 = 312,398.21 : x
  2. Step 2: Convert to fraction form
    554,119.13/764,667.05 = 312,398.21/x
  3. Step 3: Cross multiply
    554,119.13x = 764,667.05 × 312,398.21
  4. Step 4: Simplify right side
    554,119.13x = 238,880,612,280.65
  5. Step 5: Solve for x
    x = 238,880,612,280.65/554,119.13
  6. Step 6: Final answer
    x = 431,099.74

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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.