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Finding the Fourth Proportional to 841.48, 1,261.30 and 719.37

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Solution

The fourth proportional to 841.48, 1,261.30 and 719.37 is: 1,078.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.48 : 1,261.30 = 719.37 : x
  2. Step 2: Convert to fraction form
    841.48/1,261.30 = 719.37/x
  3. Step 3: Cross multiply
    841.48x = 1,261.30 × 719.37
  4. Step 4: Simplify right side
    841.48x = 907,341.38
  5. Step 5: Solve for x
    x = 907,341.38/841.48
  6. Step 6: Final answer
    x = 1,078.27

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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.