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Finding the Fourth Proportional to 1,330,493.10, 1,995,739.65 and 770,621.10

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Solution

The fourth proportional to 1,330,493.10, 1,995,739.65 and 770,621.10 is: 1,155,931.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330,493.10 : 1,995,739.65 = 770,621.10 : x
  2. Step 2: Convert to fraction form
    1,330,493.10/1,995,739.65 = 770,621.10/x
  3. Step 3: Cross multiply
    1,330,493.10x = 1,995,739.65 × 770,621.10
  4. Step 4: Simplify right side
    1,330,493.10x = 1,537,959,084,396.62
  5. Step 5: Solve for x
    x = 1,537,959,084,396.62/1,330,493.10
  6. Step 6: Final answer
    x = 1,155,931.65

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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.