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Finding the Fourth Proportional to 689,934.30, 952,107.89 and 388,128.30

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Solution

The fourth proportional to 689,934.30, 952,107.89 and 388,128.30 is: 535,616.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,934.30 : 952,107.89 = 388,128.30 : x
  2. Step 2: Convert to fraction form
    689,934.30/952,107.89 = 388,128.30/x
  3. Step 3: Cross multiply
    689,934.30x = 952,107.89 × 388,128.30
  4. Step 4: Simplify right side
    689,934.30x = 369,540,014,821.65
  5. Step 5: Solve for x
    x = 369,540,014,821.65/689,934.30
  6. Step 6: Final answer
    x = 535,616.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.