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Finding the Fourth Proportional to 1,771.60, 2,656.88 and 846.64

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Solution

The fourth proportional to 1,771.60, 2,656.88 and 846.64 is: 1,269.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.60 : 2,656.88 = 846.64 : x
  2. Step 2: Convert to fraction form
    1,771.60/2,656.88 = 846.64/x
  3. Step 3: Cross multiply
    1,771.60x = 2,656.88 × 846.64
  4. Step 4: Simplify right side
    1,771.60x = 2,249,420.88
  5. Step 5: Solve for x
    x = 2,249,420.88/1,771.60
  6. Step 6: Final answer
    x = 1,269.71

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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.