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Finding the Fourth Proportional to 1,090.63, 1,505.27 and 624.88

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Solution

The fourth proportional to 1,090.63, 1,505.27 and 624.88 is: 862.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.63 : 1,505.27 = 624.88 : x
  2. Step 2: Convert to fraction form
    1,090.63/1,505.27 = 624.88/x
  3. Step 3: Cross multiply
    1,090.63x = 1,505.27 × 624.88
  4. Step 4: Simplify right side
    1,090.63x = 940,613.12
  5. Step 5: Solve for x
    x = 940,613.12/1,090.63
  6. Step 6: Final answer
    x = 862.45

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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.