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Finding the Fourth Proportional to 570.89, 787.81 and 322.21

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Solution

The fourth proportional to 570.89, 787.81 and 322.21 is: 444.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.89 : 787.81 = 322.21 : x
  2. Step 2: Convert to fraction form
    570.89/787.81 = 322.21/x
  3. Step 3: Cross multiply
    570.89x = 787.81 × 322.21
  4. Step 4: Simplify right side
    570.89x = 253,840.26
  5. Step 5: Solve for x
    x = 253,840.26/570.89
  6. Step 6: Final answer
    x = 444.64

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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.