Home / 3,120.64-4,681.70-929.32

Finding the Fourth Proportional to 3,120.64, 4,681.70 and 929.32

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Solution

The fourth proportional to 3,120.64, 4,681.70 and 929.32 is: 1,394.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.64 : 4,681.70 = 929.32 : x
  2. Step 2: Convert to fraction form
    3,120.64/4,681.70 = 929.32/x
  3. Step 3: Cross multiply
    3,120.64x = 4,681.70 × 929.32
  4. Step 4: Simplify right side
    3,120.64x = 4,350,797.44
  5. Step 5: Solve for x
    x = 4,350,797.44/3,120.64
  6. Step 6: Final answer
    x = 1,394.20

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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.