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Finding the Fourth Proportional to 724,311.36, 999,531 and 402,012

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Solution

The fourth proportional to 724,311.36, 999,531 and 402,012 is: 554,766.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,311.36 : 999,531 = 402,012 : x
  2. Step 2: Convert to fraction form
    724,311.36/999,531 = 402,012/x
  3. Step 3: Cross multiply
    724,311.36x = 999,531 × 402,012
  4. Step 4: Simplify right side
    724,311.36x = 401,823,456,372
  5. Step 5: Solve for x
    x = 401,823,456,372/724,311.36
  6. Step 6: Final answer
    x = 554,766.19

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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.