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Finding the Fourth Proportional to 885,775.80, 1,328,858.10 and 436,711.80

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Solution

The fourth proportional to 885,775.80, 1,328,858.10 and 436,711.80 is: 655,163.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,775.80 : 1,328,858.10 = 436,711.80 : x
  2. Step 2: Convert to fraction form
    885,775.80/1,328,858.10 = 436,711.80/x
  3. Step 3: Cross multiply
    885,775.80x = 1,328,858.10 × 436,711.80
  4. Step 4: Simplify right side
    885,775.80x = 580,328,012,795.58
  5. Step 5: Solve for x
    x = 580,328,012,795.58/885,775.80
  6. Step 6: Final answer
    x = 655,163.54

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Double scale
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1.5x scale

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.