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Finding the Fourth Proportional to 1,487.67, 2,228.28 and 706.47

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Solution

The fourth proportional to 1,487.67, 2,228.28 and 706.47 is: 1,058.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.67 : 2,228.28 = 706.47 : x
  2. Step 2: Convert to fraction form
    1,487.67/2,228.28 = 706.47/x
  3. Step 3: Cross multiply
    1,487.67x = 2,228.28 × 706.47
  4. Step 4: Simplify right side
    1,487.67x = 1,574,212.97
  5. Step 5: Solve for x
    x = 1,574,212.97/1,487.67
  6. Step 6: Final answer
    x = 1,058.17

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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.