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Finding the Fourth Proportional to 2,784.72, 4,176.60 and 836.40

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Solution

The fourth proportional to 2,784.72, 4,176.60 and 836.40 is: 1,254.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,784.72 : 4,176.60 = 836.40 : x
  2. Step 2: Convert to fraction form
    2,784.72/4,176.60 = 836.40/x
  3. Step 3: Cross multiply
    2,784.72x = 4,176.60 × 836.40
  4. Step 4: Simplify right side
    2,784.72x = 3,493,308.24
  5. Step 5: Solve for x
    x = 3,493,308.24/2,784.72
  6. Step 6: Final answer
    x = 1,254.46

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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.