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Finding the Fourth Proportional to 769.37, 1,061.51 and 572.94

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Solution

The fourth proportional to 769.37, 1,061.51 and 572.94 is: 790.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.37 : 1,061.51 = 572.94 : x
  2. Step 2: Convert to fraction form
    769.37/1,061.51 = 572.94/x
  3. Step 3: Cross multiply
    769.37x = 1,061.51 × 572.94
  4. Step 4: Simplify right side
    769.37x = 608,178.67
  5. Step 5: Solve for x
    x = 608,178.67/769.37
  6. Step 6: Final answer
    x = 790.49

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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.