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Finding the Fourth Proportional to 1,858.07, 2,564.13 and 1,018.78

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Solution

The fourth proportional to 1,858.07, 2,564.13 and 1,018.78 is: 1,405.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,858.07 : 2,564.13 = 1,018.78 : x
  2. Step 2: Convert to fraction form
    1,858.07/2,564.13 = 1,018.78/x
  3. Step 3: Cross multiply
    1,858.07x = 2,564.13 × 1,018.78
  4. Step 4: Simplify right side
    1,858.07x = 2,612,284.36
  5. Step 5: Solve for x
    x = 2,612,284.36/1,858.07
  6. Step 6: Final answer
    x = 1,405.91

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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.