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Finding the Fourth Proportional to 5,918.79, 8,878.67 and 1,969.91

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Solution

The fourth proportional to 5,918.79, 8,878.67 and 1,969.91 is: 2,955.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,918.79 : 8,878.67 = 1,969.91 : x
  2. Step 2: Convert to fraction form
    5,918.79/8,878.67 = 1,969.91/x
  3. Step 3: Cross multiply
    5,918.79x = 8,878.67 × 1,969.91
  4. Step 4: Simplify right side
    5,918.79x = 17,490,126.58
  5. Step 5: Solve for x
    x = 17,490,126.58/5,918.79
  6. Step 6: Final answer
    x = 2,955.02

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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.