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Finding the Fourth Proportional to 4,621.19, 6,921.98 and 4,290.71

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Solution

The fourth proportional to 4,621.19, 6,921.98 and 4,290.71 is: 6,426.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,621.19 : 6,921.98 = 4,290.71 : x
  2. Step 2: Convert to fraction form
    4,621.19/6,921.98 = 4,290.71/x
  3. Step 3: Cross multiply
    4,621.19x = 6,921.98 × 4,290.71
  4. Step 4: Simplify right side
    4,621.19x = 29,700,187.35
  5. Step 5: Solve for x
    x = 29,700,187.35/4,621.19
  6. Step 6: Final answer
    x = 6,426.96

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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.