Home / 1,915.34-2,641.90-1,207.20

Finding the Fourth Proportional to 1,915.34, 2,641.90 and 1,207.20

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Solution

The fourth proportional to 1,915.34, 2,641.90 and 1,207.20 is: 1,665.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.34 : 2,641.90 = 1,207.20 : x
  2. Step 2: Convert to fraction form
    1,915.34/2,641.90 = 1,207.20/x
  3. Step 3: Cross multiply
    1,915.34x = 2,641.90 × 1,207.20
  4. Step 4: Simplify right side
    1,915.34x = 3,189,292.06
  5. Step 5: Solve for x
    x = 3,189,292.06/1,915.34
  6. Step 6: Final answer
    x = 1,665.13

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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.