Home / 5,172.34-7,758.38-1,276.78

Finding the Fourth Proportional to 5,172.34, 7,758.38 and 1,276.78

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Solution

The fourth proportional to 5,172.34, 7,758.38 and 1,276.78 is: 1,915.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.34 : 7,758.38 = 1,276.78 : x
  2. Step 2: Convert to fraction form
    5,172.34/7,758.38 = 1,276.78/x
  3. Step 3: Cross multiply
    5,172.34x = 7,758.38 × 1,276.78
  4. Step 4: Simplify right side
    5,172.34x = 9,905,744.42
  5. Step 5: Solve for x
    x = 9,905,744.42/5,172.34
  6. Step 6: Final answer
    x = 1,915.14

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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.