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Finding the Fourth Proportional to 2,777.60, 4,166.40 and 830.48

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Solution

The fourth proportional to 2,777.60, 4,166.40 and 830.48 is: 1,245.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.60 : 4,166.40 = 830.48 : x
  2. Step 2: Convert to fraction form
    2,777.60/4,166.40 = 830.48/x
  3. Step 3: Cross multiply
    2,777.60x = 4,166.40 × 830.48
  4. Step 4: Simplify right side
    2,777.60x = 3,460,111.87
  5. Step 5: Solve for x
    x = 3,460,111.87/2,777.60
  6. Step 6: Final answer
    x = 1,245.72

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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.