Home / 3,240.72-4,860.72-1,292.40

Finding the Fourth Proportional to 3,240.72, 4,860.72 and 1,292.40

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Solution

The fourth proportional to 3,240.72, 4,860.72 and 1,292.40 is: 1,938.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.72 : 4,860.72 = 1,292.40 : x
  2. Step 2: Convert to fraction form
    3,240.72/4,860.72 = 1,292.40/x
  3. Step 3: Cross multiply
    3,240.72x = 4,860.72 × 1,292.40
  4. Step 4: Simplify right side
    3,240.72x = 6,281,994.53
  5. Step 5: Solve for x
    x = 6,281,994.53/3,240.72
  6. Step 6: Final answer
    x = 1,938.46

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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.