Home / 643,599.40-966,176.70-638,933.80

Finding the Fourth Proportional to 643,599.40, 966,176.70 and 638,933.80

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Solution

The fourth proportional to 643,599.40, 966,176.70 and 638,933.80 is: 959,172.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,599.40 : 966,176.70 = 638,933.80 : x
  2. Step 2: Convert to fraction form
    643,599.40/966,176.70 = 638,933.80/x
  3. Step 3: Cross multiply
    643,599.40x = 966,176.70 × 638,933.80
  4. Step 4: Simplify right side
    643,599.40x = 617,322,950,402.46
  5. Step 5: Solve for x
    x = 617,322,950,402.46/643,599.40
  6. Step 6: Final answer
    x = 959,172.66

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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.