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Finding the Fourth Proportional to 5,317.96, 7,977.24 and 1,620.32

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Solution

The fourth proportional to 5,317.96, 7,977.24 and 1,620.32 is: 2,430.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,317.96 : 7,977.24 = 1,620.32 : x
  2. Step 2: Convert to fraction form
    5,317.96/7,977.24 = 1,620.32/x
  3. Step 3: Cross multiply
    5,317.96x = 7,977.24 × 1,620.32
  4. Step 4: Simplify right side
    5,317.96x = 12,925,681.52
  5. Step 5: Solve for x
    x = 12,925,681.52/5,317.96
  6. Step 6: Final answer
    x = 2,430.57

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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.