Home / 1,285.04-1,915.19-1,274.31

Finding the Fourth Proportional to 1,285.04, 1,915.19 and 1,274.31

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Solution

The fourth proportional to 1,285.04, 1,915.19 and 1,274.31 is: 1,899.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.04 : 1,915.19 = 1,274.31 : x
  2. Step 2: Convert to fraction form
    1,285.04/1,915.19 = 1,274.31/x
  3. Step 3: Cross multiply
    1,285.04x = 1,915.19 × 1,274.31
  4. Step 4: Simplify right side
    1,285.04x = 2,440,545.77
  5. Step 5: Solve for x
    x = 2,440,545.77/1,285.04
  6. Step 6: Final answer
    x = 1,899.20

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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.