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Finding the Fourth Proportional to 5,280.72, 7,921.07 and 1,770.45

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Solution

The fourth proportional to 5,280.72, 7,921.07 and 1,770.45 is: 2,655.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.72 : 7,921.07 = 1,770.45 : x
  2. Step 2: Convert to fraction form
    5,280.72/7,921.07 = 1,770.45/x
  3. Step 3: Cross multiply
    5,280.72x = 7,921.07 × 1,770.45
  4. Step 4: Simplify right side
    5,280.72x = 14,023,858.38
  5. Step 5: Solve for x
    x = 14,023,858.38/5,280.72
  6. Step 6: Final answer
    x = 2,655.67

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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.