Home / 2,124.45-2,931.68-1,240.74

Finding the Fourth Proportional to 2,124.45, 2,931.68 and 1,240.74

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Solution

The fourth proportional to 2,124.45, 2,931.68 and 1,240.74 is: 1,712.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.45 : 2,931.68 = 1,240.74 : x
  2. Step 2: Convert to fraction form
    2,124.45/2,931.68 = 1,240.74/x
  3. Step 3: Cross multiply
    2,124.45x = 2,931.68 × 1,240.74
  4. Step 4: Simplify right side
    2,124.45x = 3,637,455.75
  5. Step 5: Solve for x
    x = 3,637,455.75/2,124.45
  6. Step 6: Final answer
    x = 1,712.19

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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.