Home / 3,125.19-4,312.99-1,780.86

Finding the Fourth Proportional to 3,125.19, 4,312.99 and 1,780.86

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Solution

The fourth proportional to 3,125.19, 4,312.99 and 1,780.86 is: 2,457.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.19 : 4,312.99 = 1,780.86 : x
  2. Step 2: Convert to fraction form
    3,125.19/4,312.99 = 1,780.86/x
  3. Step 3: Cross multiply
    3,125.19x = 4,312.99 × 1,780.86
  4. Step 4: Simplify right side
    3,125.19x = 7,680,831.37
  5. Step 5: Solve for x
    x = 7,680,831.37/3,125.19
  6. Step 6: Final answer
    x = 2,457.72

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Half scale
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Double scale
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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.