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Finding the Fourth Proportional to 4,978.13, 7,468.13 and 1,860.32

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Solution

The fourth proportional to 4,978.13, 7,468.13 and 1,860.32 is: 2,790.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978.13 : 7,468.13 = 1,860.32 : x
  2. Step 2: Convert to fraction form
    4,978.13/7,468.13 = 1,860.32/x
  3. Step 3: Cross multiply
    4,978.13x = 7,468.13 × 1,860.32
  4. Step 4: Simplify right side
    4,978.13x = 13,893,134.92
  5. Step 5: Solve for x
    x = 13,893,134.92/4,978.13
  6. Step 6: Final answer
    x = 2,790.84

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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.