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Finding the Fourth Proportional to 995.11, 1,491.53 and 507.13

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Solution

The fourth proportional to 995.11, 1,491.53 and 507.13 is: 760.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.11 : 1,491.53 = 507.13 : x
  2. Step 2: Convert to fraction form
    995.11/1,491.53 = 507.13/x
  3. Step 3: Cross multiply
    995.11x = 1,491.53 × 507.13
  4. Step 4: Simplify right side
    995.11x = 756,392.15
  5. Step 5: Solve for x
    x = 756,392.15/995.11
  6. Step 6: Final answer
    x = 760.11

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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.