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Finding the Fourth Proportional to 823,911.20, 1,155,964 and 823,911.20

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Solution

The fourth proportional to 823,911.20, 1,155,964 and 823,911.20 is: 1,155,964

Step by Step Solution

  1. Step 1: Write the proportion equation
    823,911.20 : 1,155,964 = 823,911.20 : x
  2. Step 2: Convert to fraction form
    823,911.20/1,155,964 = 823,911.20/x
  3. Step 3: Cross multiply
    823,911.20x = 1,155,964 × 823,911.20
  4. Step 4: Simplify right side
    823,911.20x = 952,411,686,396.80
  5. Step 5: Solve for x
    x = 952,411,686,396.80/823,911.20
  6. Step 6: Final answer
    x = 1,155,964

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.