Home / 802,385,999.70-1,203,578,999.55-521,506,145.18

Finding the Fourth Proportional to 802,385,999.70, 1,203,578,999.55 and 521,506,145.18

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Solution

The fourth proportional to 802,385,999.70, 1,203,578,999.55 and 521,506,145.18 is: 782,259,217.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    802,385,999.70 : 1,203,578,999.55 = 521,506,145.18 : x
  2. Step 2: Convert to fraction form
    802,385,999.70/1,203,578,999.55 = 521,506,145.18/x
  3. Step 3: Cross multiply
    802,385,999.70x = 1,203,578,999.55 × 521,506,145.18
  4. Step 4: Simplify right side
    802,385,999.70x = 627,673,844,468,903,552
  5. Step 5: Solve for x
    x = 627,673,844,468,903,552/802,385,999.70
  6. Step 6: Final answer
    x = 782,259,217.76

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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.