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Finding the Fourth Proportional to 887,006.40, 1,330,509.60 and 255,940.80

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Solution

The fourth proportional to 887,006.40, 1,330,509.60 and 255,940.80 is: 383,911.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,006.40 : 1,330,509.60 = 255,940.80 : x
  2. Step 2: Convert to fraction form
    887,006.40/1,330,509.60 = 255,940.80/x
  3. Step 3: Cross multiply
    887,006.40x = 1,330,509.60 × 255,940.80
  4. Step 4: Simplify right side
    887,006.40x = 340,531,691,431.68
  5. Step 5: Solve for x
    x = 340,531,691,431.68/887,006.40
  6. Step 6: Final answer
    x = 383,911.20

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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.