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Finding the Fourth Proportional to 900.26, 1,242.80 and 606.02

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Solution

The fourth proportional to 900.26, 1,242.80 and 606.02 is: 836.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.26 : 1,242.80 = 606.02 : x
  2. Step 2: Convert to fraction form
    900.26/1,242.80 = 606.02/x
  3. Step 3: Cross multiply
    900.26x = 1,242.80 × 606.02
  4. Step 4: Simplify right side
    900.26x = 753,161.66
  5. Step 5: Solve for x
    x = 753,161.66/900.26
  6. Step 6: Final answer
    x = 836.60

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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.