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Finding the Fourth Proportional to 1,772.29, 2,658.45 and 907.21

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Solution

The fourth proportional to 1,772.29, 2,658.45 and 907.21 is: 1,360.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.29 : 2,658.45 = 907.21 : x
  2. Step 2: Convert to fraction form
    1,772.29/2,658.45 = 907.21/x
  3. Step 3: Cross multiply
    1,772.29x = 2,658.45 × 907.21
  4. Step 4: Simplify right side
    1,772.29x = 2,411,772.42
  5. Step 5: Solve for x
    x = 2,411,772.42/1,772.29
  6. Step 6: Final answer
    x = 1,360.82

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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.