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Finding the Fourth Proportional to 1,858.55, 2,788.11 and 625.86

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Solution

The fourth proportional to 1,858.55, 2,788.11 and 625.86 is: 938.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,858.55 : 2,788.11 = 625.86 : x
  2. Step 2: Convert to fraction form
    1,858.55/2,788.11 = 625.86/x
  3. Step 3: Cross multiply
    1,858.55x = 2,788.11 × 625.86
  4. Step 4: Simplify right side
    1,858.55x = 1,744,966.52
  5. Step 5: Solve for x
    x = 1,744,966.52/1,858.55
  6. Step 6: Final answer
    x = 938.89

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1.5x scale

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.