Home / 2,420.10-3,339.75-1,412.40

Finding the Fourth Proportional to 2,420.10, 3,339.75 and 1,412.40

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Solution

The fourth proportional to 2,420.10, 3,339.75 and 1,412.40 is: 1,949.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.10 : 3,339.75 = 1,412.40 : x
  2. Step 2: Convert to fraction form
    2,420.10/3,339.75 = 1,412.40/x
  3. Step 3: Cross multiply
    2,420.10x = 3,339.75 × 1,412.40
  4. Step 4: Simplify right side
    2,420.10x = 4,717,062.90
  5. Step 5: Solve for x
    x = 4,717,062.90/2,420.10
  6. Step 6: Final answer
    x = 1,949.12

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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.