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Finding the Fourth Proportional to 1,265.18, 1,897.90 and 443.50

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Solution

The fourth proportional to 1,265.18, 1,897.90 and 443.50 is: 665.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.18 : 1,897.90 = 443.50 : x
  2. Step 2: Convert to fraction form
    1,265.18/1,897.90 = 443.50/x
  3. Step 3: Cross multiply
    1,265.18x = 1,897.90 × 443.50
  4. Step 4: Simplify right side
    1,265.18x = 841,712.80
  5. Step 5: Solve for x
    x = 841,712.80/1,265.18
  6. Step 6: Final answer
    x = 665.29

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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.