Home / 1,869.79-2,782.61-1,807.51

Finding the Fourth Proportional to 1,869.79, 2,782.61 and 1,807.51

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Solution

The fourth proportional to 1,869.79, 2,782.61 and 1,807.51 is: 2,689.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.79 : 2,782.61 = 1,807.51 : x
  2. Step 2: Convert to fraction form
    1,869.79/2,782.61 = 1,807.51/x
  3. Step 3: Cross multiply
    1,869.79x = 2,782.61 × 1,807.51
  4. Step 4: Simplify right side
    1,869.79x = 5,029,595.40
  5. Step 5: Solve for x
    x = 5,029,595.40/1,869.79
  6. Step 6: Final answer
    x = 2,689.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.