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Finding the Fourth Proportional to 810.30, 1,118.21 and 456.22

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Solution

The fourth proportional to 810.30, 1,118.21 and 456.22 is: 629.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.30 : 1,118.21 = 456.22 : x
  2. Step 2: Convert to fraction form
    810.30/1,118.21 = 456.22/x
  3. Step 3: Cross multiply
    810.30x = 1,118.21 × 456.22
  4. Step 4: Simplify right side
    810.30x = 510,152.69
  5. Step 5: Solve for x
    x = 510,152.69/810.30
  6. Step 6: Final answer
    x = 629.58

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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.