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Finding the Fourth Proportional to 1,856.77, 2,785.20 and 558.25

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Solution

The fourth proportional to 1,856.77, 2,785.20 and 558.25 is: 837.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.77 : 2,785.20 = 558.25 : x
  2. Step 2: Convert to fraction form
    1,856.77/2,785.20 = 558.25/x
  3. Step 3: Cross multiply
    1,856.77x = 2,785.20 × 558.25
  4. Step 4: Simplify right side
    1,856.77x = 1,554,837.90
  5. Step 5: Solve for x
    x = 1,554,837.90/1,856.77
  6. Step 6: Final answer
    x = 837.39

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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.