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Finding the Fourth Proportional to 1,640.51, 2,461.16 and 715.82

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Solution

The fourth proportional to 1,640.51, 2,461.16 and 715.82 is: 1,073.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.51 : 2,461.16 = 715.82 : x
  2. Step 2: Convert to fraction form
    1,640.51/2,461.16 = 715.82/x
  3. Step 3: Cross multiply
    1,640.51x = 2,461.16 × 715.82
  4. Step 4: Simplify right side
    1,640.51x = 1,761,731.67
  5. Step 5: Solve for x
    x = 1,761,731.67/1,640.51
  6. Step 6: Final answer
    x = 1,073.90

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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.