Home / 3,126.30-4,688.28-1,276.40

Finding the Fourth Proportional to 3,126.30, 4,688.28 and 1,276.40

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Solution

The fourth proportional to 3,126.30, 4,688.28 and 1,276.40 is: 1,914.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.30 : 4,688.28 = 1,276.40 : x
  2. Step 2: Convert to fraction form
    3,126.30/4,688.28 = 1,276.40/x
  3. Step 3: Cross multiply
    3,126.30x = 4,688.28 × 1,276.40
  4. Step 4: Simplify right side
    3,126.30x = 5,984,097.15
  5. Step 5: Solve for x
    x = 5,984,097.15/3,126.30
  6. Step 6: Final answer
    x = 1,914.11

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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.