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Finding the Fourth Proportional to 1,487.14, 2,051.28 and 897.28

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Solution

The fourth proportional to 1,487.14, 2,051.28 and 897.28 is: 1,237.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.14 : 2,051.28 = 897.28 : x
  2. Step 2: Convert to fraction form
    1,487.14/2,051.28 = 897.28/x
  3. Step 3: Cross multiply
    1,487.14x = 2,051.28 × 897.28
  4. Step 4: Simplify right side
    1,487.14x = 1,840,572.52
  5. Step 5: Solve for x
    x = 1,840,572.52/1,487.14
  6. Step 6: Final answer
    x = 1,237.66

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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.