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Finding the Fourth Proportional to 570.50, 787.30 and 321.77

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Solution

The fourth proportional to 570.50, 787.30 and 321.77 is: 444.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.50 : 787.30 = 321.77 : x
  2. Step 2: Convert to fraction form
    570.50/787.30 = 321.77/x
  3. Step 3: Cross multiply
    570.50x = 787.30 × 321.77
  4. Step 4: Simplify right side
    570.50x = 253,332.29
  5. Step 5: Solve for x
    x = 253,332.29/570.50
  6. Step 6: Final answer
    x = 444.05

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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.