Home / 1,239.19-1,857.40-623.43

Finding the Fourth Proportional to 1,239.19, 1,857.40 and 623.43

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Solution

The fourth proportional to 1,239.19, 1,857.40 and 623.43 is: 934.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.19 : 1,857.40 = 623.43 : x
  2. Step 2: Convert to fraction form
    1,239.19/1,857.40 = 623.43/x
  3. Step 3: Cross multiply
    1,239.19x = 1,857.40 × 623.43
  4. Step 4: Simplify right side
    1,239.19x = 1,157,957.32
  5. Step 5: Solve for x
    x = 1,157,957.32/1,239.19
  6. Step 6: Final answer
    x = 934.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.