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Finding the Fourth Proportional to 1,010.10, 1,515.41 and 393.99

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Solution

The fourth proportional to 1,010.10, 1,515.41 and 393.99 is: 591.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.10 : 1,515.41 = 393.99 : x
  2. Step 2: Convert to fraction form
    1,010.10/1,515.41 = 393.99/x
  3. Step 3: Cross multiply
    1,010.10x = 1,515.41 × 393.99
  4. Step 4: Simplify right side
    1,010.10x = 597,050.21
  5. Step 5: Solve for x
    x = 597,050.21/1,010.10
  6. Step 6: Final answer
    x = 591.08

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1.5x scale

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.