Home / 2,400.63-3,312.90-1,405.68

Finding the Fourth Proportional to 2,400.63, 3,312.90 and 1,405.68

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Solution

The fourth proportional to 2,400.63, 3,312.90 and 1,405.68 is: 1,939.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,400.63 : 3,312.90 = 1,405.68 : x
  2. Step 2: Convert to fraction form
    2,400.63/3,312.90 = 1,405.68/x
  3. Step 3: Cross multiply
    2,400.63x = 3,312.90 × 1,405.68
  4. Step 4: Simplify right side
    2,400.63x = 4,656,877.27
  5. Step 5: Solve for x
    x = 4,656,877.27/2,400.63
  6. Step 6: Final answer
    x = 1,939.86

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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.