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Finding the Fourth Proportional to 911,048.40, 1,366,391.16 and 311,959.44

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Solution

The fourth proportional to 911,048.40, 1,366,391.16 and 311,959.44 is: 467,877.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,048.40 : 1,366,391.16 = 311,959.44 : x
  2. Step 2: Convert to fraction form
    911,048.40/1,366,391.16 = 311,959.44/x
  3. Step 3: Cross multiply
    911,048.40x = 1,366,391.16 × 311,959.44
  4. Step 4: Simplify right side
    911,048.40x = 426,258,621,094.55
  5. Step 5: Solve for x
    x = 426,258,621,094.55/911,048.40
  6. Step 6: Final answer
    x = 467,877.03

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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.