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Finding the Fourth Proportional to 1,607.02, 2,407.40 and 988.90

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Solution

The fourth proportional to 1,607.02, 2,407.40 and 988.90 is: 1,481.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.02 : 2,407.40 = 988.90 : x
  2. Step 2: Convert to fraction form
    1,607.02/2,407.40 = 988.90/x
  3. Step 3: Cross multiply
    1,607.02x = 2,407.40 × 988.90
  4. Step 4: Simplify right side
    1,607.02x = 2,380,677.86
  5. Step 5: Solve for x
    x = 2,380,677.86/1,607.02
  6. Step 6: Final answer
    x = 1,481.42

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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.