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Finding the Fourth Proportional to 971.72, 1,457.53 and 841.29

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Solution

The fourth proportional to 971.72, 1,457.53 and 841.29 is: 1,261.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.72 : 1,457.53 = 841.29 : x
  2. Step 2: Convert to fraction form
    971.72/1,457.53 = 841.29/x
  3. Step 3: Cross multiply
    971.72x = 1,457.53 × 841.29
  4. Step 4: Simplify right side
    971.72x = 1,226,205.41
  5. Step 5: Solve for x
    x = 1,226,205.41/971.72
  6. Step 6: Final answer
    x = 1,261.89

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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.