Home / 1,282.79-1,915.44-1,125.45

Finding the Fourth Proportional to 1,282.79, 1,915.44 and 1,125.45

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Solution

The fourth proportional to 1,282.79, 1,915.44 and 1,125.45 is: 1,680.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.79 : 1,915.44 = 1,125.45 : x
  2. Step 2: Convert to fraction form
    1,282.79/1,915.44 = 1,125.45/x
  3. Step 3: Cross multiply
    1,282.79x = 1,915.44 × 1,125.45
  4. Step 4: Simplify right side
    1,282.79x = 2,155,731.95
  5. Step 5: Solve for x
    x = 2,155,731.95/1,282.79
  6. Step 6: Final answer
    x = 1,680.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.