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Finding the Fourth Proportional to 1,270.02, 1,904.98 and 345.72

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Solution

The fourth proportional to 1,270.02, 1,904.98 and 345.72 is: 518.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.02 : 1,904.98 = 345.72 : x
  2. Step 2: Convert to fraction form
    1,270.02/1,904.98 = 345.72/x
  3. Step 3: Cross multiply
    1,270.02x = 1,904.98 × 345.72
  4. Step 4: Simplify right side
    1,270.02x = 658,589.69
  5. Step 5: Solve for x
    x = 658,589.69/1,270.02
  6. Step 6: Final answer
    x = 518.57

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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.