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Finding the Fourth Proportional to 1,270.48, 1,905.88 and 500.88

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Solution

The fourth proportional to 1,270.48, 1,905.88 and 500.88 is: 751.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.48 : 1,905.88 = 500.88 : x
  2. Step 2: Convert to fraction form
    1,270.48/1,905.88 = 500.88/x
  3. Step 3: Cross multiply
    1,270.48x = 1,905.88 × 500.88
  4. Step 4: Simplify right side
    1,270.48x = 954,617.17
  5. Step 5: Solve for x
    x = 954,617.17/1,270.48
  6. Step 6: Final answer
    x = 751.38

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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.