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Finding the Fourth Proportional to 570.89, 787.90 and 331.69

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Solution

The fourth proportional to 570.89, 787.90 and 331.69 is: 457.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.89 : 787.90 = 331.69 : x
  2. Step 2: Convert to fraction form
    570.89/787.90 = 331.69/x
  3. Step 3: Cross multiply
    570.89x = 787.90 × 331.69
  4. Step 4: Simplify right side
    570.89x = 261,337.00
  5. Step 5: Solve for x
    x = 261,337.00/570.89
  6. Step 6: Final answer
    x = 457.77

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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.