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Finding the Fourth Proportional to 810.89, 1,118.76 and 496.03

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Solution

The fourth proportional to 810.89, 1,118.76 and 496.03 is: 684.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.89 : 1,118.76 = 496.03 : x
  2. Step 2: Convert to fraction form
    810.89/1,118.76 = 496.03/x
  3. Step 3: Cross multiply
    810.89x = 1,118.76 × 496.03
  4. Step 4: Simplify right side
    810.89x = 554,936.04
  5. Step 5: Solve for x
    x = 554,936.04/810.89
  6. Step 6: Final answer
    x = 684.36

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Half scale
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Double scale
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1.5x scale

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.