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Finding the Fourth Proportional to 572,228.28, 789,688.44 and 317,574

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Solution

The fourth proportional to 572,228.28, 789,688.44 and 317,574 is: 438,259.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,228.28 : 789,688.44 = 317,574 : x
  2. Step 2: Convert to fraction form
    572,228.28/789,688.44 = 317,574/x
  3. Step 3: Cross multiply
    572,228.28x = 789,688.44 × 317,574
  4. Step 4: Simplify right side
    572,228.28x = 250,784,516,644.56
  5. Step 5: Solve for x
    x = 250,784,516,644.56/572,228.28
  6. Step 6: Final answer
    x = 438,259.56

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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.