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Finding the Fourth Proportional to 911,059.20, 1,366,556.40 and 412,423.20

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Solution

The fourth proportional to 911,059.20, 1,366,556.40 and 412,423.20 is: 618,620.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,059.20 : 1,366,556.40 = 412,423.20 : x
  2. Step 2: Convert to fraction form
    911,059.20/1,366,556.40 = 412,423.20/x
  3. Step 3: Cross multiply
    911,059.20x = 1,366,556.40 × 412,423.20
  4. Step 4: Simplify right side
    911,059.20x = 563,599,563,468.48
  5. Step 5: Solve for x
    x = 563,599,563,468.48/911,059.20
  6. Step 6: Final answer
    x = 618,620.13

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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.