Home / 678,436,009.20-1,017,654,013.80-290,298,074.85

Finding the Fourth Proportional to 678,436,009.20, 1,017,654,013.80 and 290,298,074.85

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Solution

The fourth proportional to 678,436,009.20, 1,017,654,013.80 and 290,298,074.85 is: 435,447,112.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,436,009.20 : 1,017,654,013.80 = 290,298,074.85 : x
  2. Step 2: Convert to fraction form
    678,436,009.20/1,017,654,013.80 = 290,298,074.85/x
  3. Step 3: Cross multiply
    678,436,009.20x = 1,017,654,013.80 × 290,298,074.85
  4. Step 4: Simplify right side
    678,436,009.20x = 295,423,001,069,515,328
  5. Step 5: Solve for x
    x = 295,423,001,069,515,328/678,436,009.20
  6. Step 6: Final answer
    x = 435,447,112.28

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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.