Home / 3,923.20-5,416.08-2,430.40

Finding the Fourth Proportional to 3,923.20, 5,416.08 and 2,430.40

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Solution

The fourth proportional to 3,923.20, 5,416.08 and 2,430.40 is: 3,355.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.20 : 5,416.08 = 2,430.40 : x
  2. Step 2: Convert to fraction form
    3,923.20/5,416.08 = 2,430.40/x
  3. Step 3: Cross multiply
    3,923.20x = 5,416.08 × 2,430.40
  4. Step 4: Simplify right side
    3,923.20x = 13,163,240.83
  5. Step 5: Solve for x
    x = 13,163,240.83/3,923.20
  6. Step 6: Final answer
    x = 3,355.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.