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Finding the Fourth Proportional to 4,666.65, 6,999.30 and 1,379.40

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Solution

The fourth proportional to 4,666.65, 6,999.30 and 1,379.40 is: 2,068.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,666.65 : 6,999.30 = 1,379.40 : x
  2. Step 2: Convert to fraction form
    4,666.65/6,999.30 = 1,379.40/x
  3. Step 3: Cross multiply
    4,666.65x = 6,999.30 × 1,379.40
  4. Step 4: Simplify right side
    4,666.65x = 9,654,834.42
  5. Step 5: Solve for x
    x = 9,654,834.42/4,666.65
  6. Step 6: Final answer
    x = 2,068.90

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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.