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Finding the Fourth Proportional to 1,897.36, 2,618.76 and 1,276

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Solution

The fourth proportional to 1,897.36, 2,618.76 and 1,276 is: 1,761.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,897.36 : 2,618.76 = 1,276 : x
  2. Step 2: Convert to fraction form
    1,897.36/2,618.76 = 1,276/x
  3. Step 3: Cross multiply
    1,897.36x = 2,618.76 × 1,276
  4. Step 4: Simplify right side
    1,897.36x = 3,341,537.76
  5. Step 5: Solve for x
    x = 3,341,537.76/1,897.36
  6. Step 6: Final answer
    x = 1,761.15

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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.