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Finding the Fourth Proportional to 990.35, 1,484.79 and 600.25

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Solution

The fourth proportional to 990.35, 1,484.79 and 600.25 is: 899.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.35 : 1,484.79 = 600.25 : x
  2. Step 2: Convert to fraction form
    990.35/1,484.79 = 600.25/x
  3. Step 3: Cross multiply
    990.35x = 1,484.79 × 600.25
  4. Step 4: Simplify right side
    990.35x = 891,248.89
  5. Step 5: Solve for x
    x = 891,248.89/990.35
  6. Step 6: Final answer
    x = 899.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.