Home / 660,431,981.20-990,648,155.95-194,093,379.87

Finding the Fourth Proportional to 660,431,981.20, 990,648,155.95 and 194,093,379.87

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Solution

The fourth proportional to 660,431,981.20, 990,648,155.95 and 194,093,379.87 is: 291,140,123.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,431,981.20 : 990,648,155.95 = 194,093,379.87 : x
  2. Step 2: Convert to fraction form
    660,431,981.20/990,648,155.95 = 194,093,379.87/x
  3. Step 3: Cross multiply
    660,431,981.20x = 990,648,155.95 × 194,093,379.87
  4. Step 4: Simplify right side
    660,431,981.20x = 192,278,248,846,118,208
  5. Step 5: Solve for x
    x = 192,278,248,846,118,208/660,431,981.20
  6. Step 6: Final answer
    x = 291,140,123.92

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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.