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Finding the Fourth Proportional to 1,915.79, 2,645.00 and 1,253.76

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Solution

The fourth proportional to 1,915.79, 2,645.00 and 1,253.76 is: 1,730.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.79 : 2,645.00 = 1,253.76 : x
  2. Step 2: Convert to fraction form
    1,915.79/2,645.00 = 1,253.76/x
  3. Step 3: Cross multiply
    1,915.79x = 2,645.00 × 1,253.76
  4. Step 4: Simplify right side
    1,915.79x = 3,316,198.33
  5. Step 5: Solve for x
    x = 3,316,198.33/1,915.79
  6. Step 6: Final answer
    x = 1,730.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.