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Finding the Fourth Proportional to 965.18, 1,440.10 and 907.76

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Solution

The fourth proportional to 965.18, 1,440.10 and 907.76 is: 1,354.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.18 : 1,440.10 = 907.76 : x
  2. Step 2: Convert to fraction form
    965.18/1,440.10 = 907.76/x
  3. Step 3: Cross multiply
    965.18x = 1,440.10 × 907.76
  4. Step 4: Simplify right side
    965.18x = 1,307,265.18
  5. Step 5: Solve for x
    x = 1,307,265.18/965.18
  6. Step 6: Final answer
    x = 1,354.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.