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Finding the Fourth Proportional to 388,359.80, 535,828.26 and 250,480.40

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Solution

The fourth proportional to 388,359.80, 535,828.26 and 250,480.40 is: 345,593.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,359.80 : 535,828.26 = 250,480.40 : x
  2. Step 2: Convert to fraction form
    388,359.80/535,828.26 = 250,480.40/x
  3. Step 3: Cross multiply
    388,359.80x = 535,828.26 × 250,480.40
  4. Step 4: Simplify right side
    388,359.80x = 134,214,476,896.10
  5. Step 5: Solve for x
    x = 134,214,476,896.10/388,359.80
  6. Step 6: Final answer
    x = 345,593.12

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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.