Home / 3,113.04-4,668.84-921.20

Finding the Fourth Proportional to 3,113.04, 4,668.84 and 921.20

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Solution

The fourth proportional to 3,113.04, 4,668.84 and 921.20 is: 1,381.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,113.04 : 4,668.84 = 921.20 : x
  2. Step 2: Convert to fraction form
    3,113.04/4,668.84 = 921.20/x
  3. Step 3: Cross multiply
    3,113.04x = 4,668.84 × 921.20
  4. Step 4: Simplify right side
    3,113.04x = 4,300,935.41
  5. Step 5: Solve for x
    x = 4,300,935.41/3,113.04
  6. Step 6: Final answer
    x = 1,381.59

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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.