Home / 4,721.54-7,080.54-1,388.78

Finding the Fourth Proportional to 4,721.54, 7,080.54 and 1,388.78

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Solution

The fourth proportional to 4,721.54, 7,080.54 and 1,388.78 is: 2,082.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,721.54 : 7,080.54 = 1,388.78 : x
  2. Step 2: Convert to fraction form
    4,721.54/7,080.54 = 1,388.78/x
  3. Step 3: Cross multiply
    4,721.54x = 7,080.54 × 1,388.78
  4. Step 4: Simplify right side
    4,721.54x = 9,833,312.34
  5. Step 5: Solve for x
    x = 9,833,312.34/4,721.54
  6. Step 6: Final answer
    x = 2,082.65

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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.