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Finding the Fourth Proportional to 5,085.84, 7,628.67 and 1,623

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Solution

The fourth proportional to 5,085.84, 7,628.67 and 1,623 is: 2,434.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,085.84 : 7,628.67 = 1,623 : x
  2. Step 2: Convert to fraction form
    5,085.84/7,628.67 = 1,623/x
  3. Step 3: Cross multiply
    5,085.84x = 7,628.67 × 1,623
  4. Step 4: Simplify right side
    5,085.84x = 12,381,331.41
  5. Step 5: Solve for x
    x = 12,381,331.41/5,085.84
  6. Step 6: Final answer
    x = 2,434.47

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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.