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Finding the Fourth Proportional to 1,856.88, 2,782.08 and 930.24

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Solution

The fourth proportional to 1,856.88, 2,782.08 and 930.24 is: 1,393.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.88 : 2,782.08 = 930.24 : x
  2. Step 2: Convert to fraction form
    1,856.88/2,782.08 = 930.24/x
  3. Step 3: Cross multiply
    1,856.88x = 2,782.08 × 930.24
  4. Step 4: Simplify right side
    1,856.88x = 2,588,002.10
  5. Step 5: Solve for x
    x = 2,588,002.10/1,856.88
  6. Step 6: Final answer
    x = 1,393.74

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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.