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Finding the Fourth Proportional to 6,471.19, 8,918.40 and 4,699.72

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Solution

The fourth proportional to 6,471.19, 8,918.40 and 4,699.72 is: 6,477.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,471.19 : 8,918.40 = 4,699.72 : x
  2. Step 2: Convert to fraction form
    6,471.19/8,918.40 = 4,699.72/x
  3. Step 3: Cross multiply
    6,471.19x = 8,918.40 × 4,699.72
  4. Step 4: Simplify right side
    6,471.19x = 41,913,982.85
  5. Step 5: Solve for x
    x = 41,913,982.85/6,471.19
  6. Step 6: Final answer
    x = 6,477.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.