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Finding the Fourth Proportional to 810.24, 1,117.89 and 495.17

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Solution

The fourth proportional to 810.24, 1,117.89 and 495.17 is: 683.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.24 : 1,117.89 = 495.17 : x
  2. Step 2: Convert to fraction form
    810.24/1,117.89 = 495.17/x
  3. Step 3: Cross multiply
    810.24x = 1,117.89 × 495.17
  4. Step 4: Simplify right side
    810.24x = 553,540.00
  5. Step 5: Solve for x
    x = 553,540.00/810.24
  6. Step 6: Final answer
    x = 683.18

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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.