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Finding the Fourth Proportional to 1,461.54, 2,192.33 and 639.63

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Solution

The fourth proportional to 1,461.54, 2,192.33 and 639.63 is: 959.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,461.54 : 2,192.33 = 639.63 : x
  2. Step 2: Convert to fraction form
    1,461.54/2,192.33 = 639.63/x
  3. Step 3: Cross multiply
    1,461.54x = 2,192.33 × 639.63
  4. Step 4: Simplify right side
    1,461.54x = 1,402,281.64
  5. Step 5: Solve for x
    x = 1,402,281.64/1,461.54
  6. Step 6: Final answer
    x = 959.45

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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.