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Finding the Fourth Proportional to 943.45, 1,302.18 and 570.65

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Solution

The fourth proportional to 943.45, 1,302.18 and 570.65 is: 787.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.45 : 1,302.18 = 570.65 : x
  2. Step 2: Convert to fraction form
    943.45/1,302.18 = 570.65/x
  3. Step 3: Cross multiply
    943.45x = 1,302.18 × 570.65
  4. Step 4: Simplify right side
    943.45x = 743,080.37
  5. Step 5: Solve for x
    x = 743,080.37/943.45
  6. Step 6: Final answer
    x = 787.62

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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.