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Finding the Fourth Proportional to 1,779.96, 2,671.62 and 947.64

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Solution

The fourth proportional to 1,779.96, 2,671.62 and 947.64 is: 1,422.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.96 : 2,671.62 = 947.64 : x
  2. Step 2: Convert to fraction form
    1,779.96/2,671.62 = 947.64/x
  3. Step 3: Cross multiply
    1,779.96x = 2,671.62 × 947.64
  4. Step 4: Simplify right side
    1,779.96x = 2,531,733.98
  5. Step 5: Solve for x
    x = 2,531,733.98/1,779.96
  6. Step 6: Final answer
    x = 1,422.35

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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.