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Finding the Fourth Proportional to 1,270.30, 1,904.13 and 652.63

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Solution

The fourth proportional to 1,270.30, 1,904.13 and 652.63 is: 978.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.30 : 1,904.13 = 652.63 : x
  2. Step 2: Convert to fraction form
    1,270.30/1,904.13 = 652.63/x
  3. Step 3: Cross multiply
    1,270.30x = 1,904.13 × 652.63
  4. Step 4: Simplify right side
    1,270.30x = 1,242,687.60
  5. Step 5: Solve for x
    x = 1,242,687.60/1,270.30
  6. Step 6: Final answer
    x = 978.27

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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.