Home / 678,436,145.70-1,017,654,218.55-290,298,211.35

Finding the Fourth Proportional to 678,436,145.70, 1,017,654,218.55 and 290,298,211.35

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Solution

The fourth proportional to 678,436,145.70, 1,017,654,218.55 and 290,298,211.35 is: 435,447,317.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,436,145.70 : 1,017,654,218.55 = 290,298,211.35 : x
  2. Step 2: Convert to fraction form
    678,436,145.70/1,017,654,218.55 = 290,298,211.35/x
  3. Step 3: Cross multiply
    678,436,145.70x = 1,017,654,218.55 × 290,298,211.35
  4. Step 4: Simplify right side
    678,436,145.70x = 295,423,199,417,846,976
  5. Step 5: Solve for x
    x = 295,423,199,417,846,976/678,436,145.70
  6. Step 6: Final answer
    x = 435,447,317.03

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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.