Home / 3,120.29-4,681.11-929.20

Finding the Fourth Proportional to 3,120.29, 4,681.11 and 929.20

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Solution

The fourth proportional to 3,120.29, 4,681.11 and 929.20 is: 1,393.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.29 : 4,681.11 = 929.20 : x
  2. Step 2: Convert to fraction form
    3,120.29/4,681.11 = 929.20/x
  3. Step 3: Cross multiply
    3,120.29x = 4,681.11 × 929.20
  4. Step 4: Simplify right side
    3,120.29x = 4,349,664.01
  5. Step 5: Solve for x
    x = 4,349,664.01/3,120.29
  6. Step 6: Final answer
    x = 1,393.99

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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.