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Finding the Fourth Proportional to 318,901.10, 479,064.45 and 266,413.10

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Solution

The fourth proportional to 318,901.10, 479,064.45 and 266,413.10 is: 400,215.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,901.10 : 479,064.45 = 266,413.10 : x
  2. Step 2: Convert to fraction form
    318,901.10/479,064.45 = 266,413.10/x
  3. Step 3: Cross multiply
    318,901.10x = 479,064.45 × 266,413.10
  4. Step 4: Simplify right side
    318,901.10x = 127,629,045,224.30
  5. Step 5: Solve for x
    x = 127,629,045,224.30/318,901.10
  6. Step 6: Final answer
    x = 400,215.13

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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.