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Finding the Fourth Proportional to 1,265.34, 1,897.68 and 484.94

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Solution

The fourth proportional to 1,265.34, 1,897.68 and 484.94 is: 727.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.34 : 1,897.68 = 484.94 : x
  2. Step 2: Convert to fraction form
    1,265.34/1,897.68 = 484.94/x
  3. Step 3: Cross multiply
    1,265.34x = 1,897.68 × 484.94
  4. Step 4: Simplify right side
    1,265.34x = 920,254.10
  5. Step 5: Solve for x
    x = 920,254.10/1,265.34
  6. Step 6: Final answer
    x = 727.28

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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.