Home / 2,400.36-3,312.80-1,405.45

Finding the Fourth Proportional to 2,400.36, 3,312.80 and 1,405.45

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Solution

The fourth proportional to 2,400.36, 3,312.80 and 1,405.45 is: 1,939.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,400.36 : 3,312.80 = 1,405.45 : x
  2. Step 2: Convert to fraction form
    2,400.36/3,312.80 = 1,405.45/x
  3. Step 3: Cross multiply
    2,400.36x = 3,312.80 × 1,405.45
  4. Step 4: Simplify right side
    2,400.36x = 4,655,974.76
  5. Step 5: Solve for x
    x = 4,655,974.76/2,400.36
  6. Step 6: Final answer
    x = 1,939.70

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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.