Home / 2,385.51-3,292.19-1,390.83

Finding the Fourth Proportional to 2,385.51, 3,292.19 and 1,390.83

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Solution

The fourth proportional to 2,385.51, 3,292.19 and 1,390.83 is: 1,919.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.51 : 3,292.19 = 1,390.83 : x
  2. Step 2: Convert to fraction form
    2,385.51/3,292.19 = 1,390.83/x
  3. Step 3: Cross multiply
    2,385.51x = 3,292.19 × 1,390.83
  4. Step 4: Simplify right side
    2,385.51x = 4,578,869.66
  5. Step 5: Solve for x
    x = 4,578,869.66/2,385.51
  6. Step 6: Final answer
    x = 1,919.45

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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.