Home / 257,640.32-355,513.92-155,727.20

Finding the Fourth Proportional to 257,640.32, 355,513.92 and 155,727.20

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Solution

The fourth proportional to 257,640.32, 355,513.92 and 155,727.20 is: 214,885.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,640.32 : 355,513.92 = 155,727.20 : x
  2. Step 2: Convert to fraction form
    257,640.32/355,513.92 = 155,727.20/x
  3. Step 3: Cross multiply
    257,640.32x = 355,513.92 × 155,727.20
  4. Step 4: Simplify right side
    257,640.32x = 55,363,187,322.62
  5. Step 5: Solve for x
    x = 55,363,187,322.62/257,640.32
  6. Step 6: Final answer
    x = 214,885.57

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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.