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Finding the Fourth Proportional to 714,999.70, 986,459.50 and 404,859.90

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Solution

The fourth proportional to 714,999.70, 986,459.50 and 404,859.90 is: 558,570.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,999.70 : 986,459.50 = 404,859.90 : x
  2. Step 2: Convert to fraction form
    714,999.70/986,459.50 = 404,859.90/x
  3. Step 3: Cross multiply
    714,999.70x = 986,459.50 × 404,859.90
  4. Step 4: Simplify right side
    714,999.70x = 399,377,894,524.05
  5. Step 5: Solve for x
    x = 399,377,894,524.05/714,999.70
  6. Step 6: Final answer
    x = 558,570.72

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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.