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Finding the Fourth Proportional to 810.54, 1,118.52 and 456.50

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Solution

The fourth proportional to 810.54, 1,118.52 and 456.50 is: 629.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.54 : 1,118.52 = 456.50 : x
  2. Step 2: Convert to fraction form
    810.54/1,118.52 = 456.50/x
  3. Step 3: Cross multiply
    810.54x = 1,118.52 × 456.50
  4. Step 4: Simplify right side
    810.54x = 510,604.38
  5. Step 5: Solve for x
    x = 510,604.38/810.54
  6. Step 6: Final answer
    x = 629.96

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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.