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Finding the Fourth Proportional to 3,920.98, 5,881.51 and 999.29

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Solution

The fourth proportional to 3,920.98, 5,881.51 and 999.29 is: 1,498.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.98 : 5,881.51 = 999.29 : x
  2. Step 2: Convert to fraction form
    3,920.98/5,881.51 = 999.29/x
  3. Step 3: Cross multiply
    3,920.98x = 5,881.51 × 999.29
  4. Step 4: Simplify right side
    3,920.98x = 5,877,302.22
  5. Step 5: Solve for x
    x = 5,877,302.22/3,920.98
  6. Step 6: Final answer
    x = 1,498.94

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1.5x scale

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.