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Finding the Fourth Proportional to 864.32, 1,193.30 and 570.09

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Solution

The fourth proportional to 864.32, 1,193.30 and 570.09 is: 787.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.32 : 1,193.30 = 570.09 : x
  2. Step 2: Convert to fraction form
    864.32/1,193.30 = 570.09/x
  3. Step 3: Cross multiply
    864.32x = 1,193.30 × 570.09
  4. Step 4: Simplify right side
    864.32x = 680,288.40
  5. Step 5: Solve for x
    x = 680,288.40/864.32
  6. Step 6: Final answer
    x = 787.08

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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.