Home / 3,120.07-4,680.12-929.02

Finding the Fourth Proportional to 3,120.07, 4,680.12 and 929.02

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Solution

The fourth proportional to 3,120.07, 4,680.12 and 929.02 is: 1,393.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.07 : 4,680.12 = 929.02 : x
  2. Step 2: Convert to fraction form
    3,120.07/4,680.12 = 929.02/x
  3. Step 3: Cross multiply
    3,120.07x = 4,680.12 × 929.02
  4. Step 4: Simplify right side
    3,120.07x = 4,347,925.08
  5. Step 5: Solve for x
    x = 4,347,925.08/3,120.07
  6. Step 6: Final answer
    x = 1,393.53

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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.