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Finding the Fourth Proportional to 874,698.80, 1,311,659.40 and 342,042.80

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Solution

The fourth proportional to 874,698.80, 1,311,659.40 and 342,042.80 is: 512,912.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,698.80 : 1,311,659.40 = 342,042.80 : x
  2. Step 2: Convert to fraction form
    874,698.80/1,311,659.40 = 342,042.80/x
  3. Step 3: Cross multiply
    874,698.80x = 1,311,659.40 × 342,042.80
  4. Step 4: Simplify right side
    874,698.80x = 448,643,653,822.32
  5. Step 5: Solve for x
    x = 448,643,653,822.32/874,698.80
  6. Step 6: Final answer
    x = 512,912.16

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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.