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Finding the Fourth Proportional to 900.72, 1,242.60 and 606.08

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Solution

The fourth proportional to 900.72, 1,242.60 and 606.08 is: 836.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.72 : 1,242.60 = 606.08 : x
  2. Step 2: Convert to fraction form
    900.72/1,242.60 = 606.08/x
  3. Step 3: Cross multiply
    900.72x = 1,242.60 × 606.08
  4. Step 4: Simplify right side
    900.72x = 753,108.80
  5. Step 5: Solve for x
    x = 753,108.80/900.72
  6. Step 6: Final answer
    x = 836.12

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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.