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Finding the Fourth Proportional to 4,689.97, 7,029.07 and 1,915.12

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Solution

The fourth proportional to 4,689.97, 7,029.07 and 1,915.12 is: 2,870.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,689.97 : 7,029.07 = 1,915.12 : x
  2. Step 2: Convert to fraction form
    4,689.97/7,029.07 = 1,915.12/x
  3. Step 3: Cross multiply
    4,689.97x = 7,029.07 × 1,915.12
  4. Step 4: Simplify right side
    4,689.97x = 13,461,512.54
  5. Step 5: Solve for x
    x = 13,461,512.54/4,689.97
  6. Step 6: Final answer
    x = 2,870.28

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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.