Home / 4,259.80-6,389.70-2,947.60

Finding the Fourth Proportional to 4,259.80, 6,389.70 and 2,947.60

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Solution

The fourth proportional to 4,259.80, 6,389.70 and 2,947.60 is: 4,421.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,259.80 : 6,389.70 = 2,947.60 : x
  2. Step 2: Convert to fraction form
    4,259.80/6,389.70 = 2,947.60/x
  3. Step 3: Cross multiply
    4,259.80x = 6,389.70 × 2,947.60
  4. Step 4: Simplify right side
    4,259.80x = 18,834,279.72
  5. Step 5: Solve for x
    x = 18,834,279.72/4,259.80
  6. Step 6: Final answer
    x = 4,421.40

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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.