Home / 643,624,155.40-965,436,233.10-385,635,137.80

Finding the Fourth Proportional to 643,624,155.40, 965,436,233.10 and 385,635,137.80

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Solution

The fourth proportional to 643,624,155.40, 965,436,233.10 and 385,635,137.80 is: 578,452,706.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,624,155.40 : 965,436,233.10 = 385,635,137.80 : x
  2. Step 2: Convert to fraction form
    643,624,155.40/965,436,233.10 = 385,635,137.80/x
  3. Step 3: Cross multiply
    643,624,155.40x = 965,436,233.10 × 385,635,137.80
  4. Step 4: Simplify right side
    643,624,155.40x = 372,306,134,788,631,424
  5. Step 5: Solve for x
    x = 372,306,134,788,631,424/643,624,155.40
  6. Step 6: Final answer
    x = 578,452,706.70

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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.