Home / 1,502.45-2,070.42-1,221.77

Finding the Fourth Proportional to 1,502.45, 2,070.42 and 1,221.77

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Solution

The fourth proportional to 1,502.45, 2,070.42 and 1,221.77 is: 1,683.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,502.45 : 2,070.42 = 1,221.77 : x
  2. Step 2: Convert to fraction form
    1,502.45/2,070.42 = 1,221.77/x
  3. Step 3: Cross multiply
    1,502.45x = 2,070.42 × 1,221.77
  4. Step 4: Simplify right side
    1,502.45x = 2,529,577.04
  5. Step 5: Solve for x
    x = 2,529,577.04/1,502.45
  6. Step 6: Final answer
    x = 1,683.63

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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.