Home / 1,287,467.68-1,931,216.11-388,916.86

Finding the Fourth Proportional to 1,287,467.68, 1,931,216.11 and 388,916.86

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Solution

The fourth proportional to 1,287,467.68, 1,931,216.11 and 388,916.86 is: 583,379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,467.68 : 1,931,216.11 = 388,916.86 : x
  2. Step 2: Convert to fraction form
    1,287,467.68/1,931,216.11 = 388,916.86/x
  3. Step 3: Cross multiply
    1,287,467.68x = 1,931,216.11 × 388,916.86
  4. Step 4: Simplify right side
    1,287,467.68x = 751,082,505,482.62
  5. Step 5: Solve for x
    x = 751,082,505,482.62/1,287,467.68
  6. Step 6: Final answer
    x = 583,379.70

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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.