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Finding the Fourth Proportional to 529.77, 789.47 and 512.36

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Solution

The fourth proportional to 529.77, 789.47 and 512.36 is: 763.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.77 : 789.47 = 512.36 : x
  2. Step 2: Convert to fraction form
    529.77/789.47 = 512.36/x
  3. Step 3: Cross multiply
    529.77x = 789.47 × 512.36
  4. Step 4: Simplify right side
    529.77x = 404,490.18
  5. Step 5: Solve for x
    x = 404,490.18/529.77
  6. Step 6: Final answer
    x = 763.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.