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Finding the Fourth Proportional to 1,265.08, 1,897.36 and 571.76

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Solution

The fourth proportional to 1,265.08, 1,897.36 and 571.76 is: 857.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.08 : 1,897.36 = 571.76 : x
  2. Step 2: Convert to fraction form
    1,265.08/1,897.36 = 571.76/x
  3. Step 3: Cross multiply
    1,265.08x = 1,897.36 × 571.76
  4. Step 4: Simplify right side
    1,265.08x = 1,084,834.55
  5. Step 5: Solve for x
    x = 1,084,834.55/1,265.08
  6. Step 6: Final answer
    x = 857.52

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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.