Home / 1,985.52-2,740.32-1,240.16

Finding the Fourth Proportional to 1,985.52, 2,740.32 and 1,240.16

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Solution

The fourth proportional to 1,985.52, 2,740.32 and 1,240.16 is: 1,711.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.52 : 2,740.32 = 1,240.16 : x
  2. Step 2: Convert to fraction form
    1,985.52/2,740.32 = 1,240.16/x
  3. Step 3: Cross multiply
    1,985.52x = 2,740.32 × 1,240.16
  4. Step 4: Simplify right side
    1,985.52x = 3,398,435.25
  5. Step 5: Solve for x
    x = 3,398,435.25/1,985.52
  6. Step 6: Final answer
    x = 1,711.61

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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.