Home / 4,200.40-6,300.90-1,278.70

Finding the Fourth Proportional to 4,200.40, 6,300.90 and 1,278.70

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Solution

The fourth proportional to 4,200.40, 6,300.90 and 1,278.70 is: 1,918.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,200.40 : 6,300.90 = 1,278.70 : x
  2. Step 2: Convert to fraction form
    4,200.40/6,300.90 = 1,278.70/x
  3. Step 3: Cross multiply
    4,200.40x = 6,300.90 × 1,278.70
  4. Step 4: Simplify right side
    4,200.40x = 8,056,960.83
  5. Step 5: Solve for x
    x = 8,056,960.83/4,200.40
  6. Step 6: Final answer
    x = 1,918.14

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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.