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Finding the Fourth Proportional to 4,978.55, 7,460.07 and 1,857.71

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Solution

The fourth proportional to 4,978.55, 7,460.07 and 1,857.71 is: 2,783.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978.55 : 7,460.07 = 1,857.71 : x
  2. Step 2: Convert to fraction form
    4,978.55/7,460.07 = 1,857.71/x
  3. Step 3: Cross multiply
    4,978.55x = 7,460.07 × 1,857.71
  4. Step 4: Simplify right side
    4,978.55x = 13,858,646.64
  5. Step 5: Solve for x
    x = 13,858,646.64/4,978.55
  6. Step 6: Final answer
    x = 2,783.67

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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.