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Finding the Fourth Proportional to 1,290,961.23, 1,934,670.27 and 816,797.76

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Solution

The fourth proportional to 1,290,961.23, 1,934,670.27 and 816,797.76 is: 1,224,075.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,961.23 : 1,934,670.27 = 816,797.76 : x
  2. Step 2: Convert to fraction form
    1,290,961.23/1,934,670.27 = 816,797.76/x
  3. Step 3: Cross multiply
    1,290,961.23x = 1,934,670.27 × 816,797.76
  4. Step 4: Simplify right side
    1,290,961.23x = 1,580,234,342,874.60
  5. Step 5: Solve for x
    x = 1,580,234,342,874.60/1,290,961.23
  6. Step 6: Final answer
    x = 1,224,075.76

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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.