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Finding the Fourth Proportional to 1,802.15, 2,702.64 and 691.51

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Solution

The fourth proportional to 1,802.15, 2,702.64 and 691.51 is: 1,037.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,802.15 : 2,702.64 = 691.51 : x
  2. Step 2: Convert to fraction form
    1,802.15/2,702.64 = 691.51/x
  3. Step 3: Cross multiply
    1,802.15x = 2,702.64 × 691.51
  4. Step 4: Simplify right side
    1,802.15x = 1,868,895.83
  5. Step 5: Solve for x
    x = 1,868,895.83/1,802.15
  6. Step 6: Final answer
    x = 1,037.04

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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.