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Finding the Fourth Proportional to 1,290,960.72, 1,934,669.53 and 816,797.25

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Solution

The fourth proportional to 1,290,960.72, 1,934,669.53 and 816,797.25 is: 1,224,075.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,960.72 : 1,934,669.53 = 816,797.25 : x
  2. Step 2: Convert to fraction form
    1,290,960.72/1,934,669.53 = 816,797.25/x
  3. Step 3: Cross multiply
    1,290,960.72x = 1,934,669.53 × 816,797.25
  4. Step 4: Simplify right side
    1,290,960.72x = 1,580,232,751,762.79
  5. Step 5: Solve for x
    x = 1,580,232,751,762.79/1,290,960.72
  6. Step 6: Final answer
    x = 1,224,075.01

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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.