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Finding the Fourth Proportional to 1,306.54, 1,802.66 and 841.06

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Solution

The fourth proportional to 1,306.54, 1,802.66 and 841.06 is: 1,160.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.54 : 1,802.66 = 841.06 : x
  2. Step 2: Convert to fraction form
    1,306.54/1,802.66 = 841.06/x
  3. Step 3: Cross multiply
    1,306.54x = 1,802.66 × 841.06
  4. Step 4: Simplify right side
    1,306.54x = 1,516,145.22
  5. Step 5: Solve for x
    x = 1,516,145.22/1,306.54
  6. Step 6: Final answer
    x = 1,160.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.