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Finding the Fourth Proportional to 1,010.77, 1,515.29 and 394.90

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Solution

The fourth proportional to 1,010.77, 1,515.29 and 394.90 is: 592.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.77 : 1,515.29 = 394.90 : x
  2. Step 2: Convert to fraction form
    1,010.77/1,515.29 = 394.90/x
  3. Step 3: Cross multiply
    1,010.77x = 1,515.29 × 394.90
  4. Step 4: Simplify right side
    1,010.77x = 598,388.02
  5. Step 5: Solve for x
    x = 598,388.02/1,010.77
  6. Step 6: Final answer
    x = 592.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.