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Finding the Fourth Proportional to 810.50, 1,118.52 and 730.94

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Solution

The fourth proportional to 810.50, 1,118.52 and 730.94 is: 1,008.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.50 : 1,118.52 = 730.94 : x
  2. Step 2: Convert to fraction form
    810.50/1,118.52 = 730.94/x
  3. Step 3: Cross multiply
    810.50x = 1,118.52 × 730.94
  4. Step 4: Simplify right side
    810.50x = 817,571.01
  5. Step 5: Solve for x
    x = 817,571.01/810.50
  6. Step 6: Final answer
    x = 1,008.72

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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.