Home / 1,187,172,193.42-1,780,758,345.50-813,311,421.54

Finding the Fourth Proportional to 1,187,172,193.42, 1,780,758,345.50 and 813,311,421.54

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Solution

The fourth proportional to 1,187,172,193.42, 1,780,758,345.50 and 813,311,421.54 is: 1,219,967,170.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,172,193.42 : 1,780,758,345.50 = 813,311,421.54 : x
  2. Step 2: Convert to fraction form
    1,187,172,193.42/1,780,758,345.50 = 813,311,421.54/x
  3. Step 3: Cross multiply
    1,187,172,193.42x = 1,780,758,345.50 × 813,311,421.54
  4. Step 4: Simplify right side
    1,187,172,193.42x = 1,448,311,101,386,886,400
  5. Step 5: Solve for x
    x = 1,448,311,101,386,886,400/1,187,172,193.42
  6. Step 6: Final answer
    x = 1,219,967,170.23

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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.