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Finding the Fourth Proportional to 690,224.30, 952,507.59 and 388,418.30

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Solution

The fourth proportional to 690,224.30, 952,507.59 and 388,418.30 is: 536,016.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,224.30 : 952,507.59 = 388,418.30 : x
  2. Step 2: Convert to fraction form
    690,224.30/952,507.59 = 388,418.30/x
  3. Step 3: Cross multiply
    690,224.30x = 952,507.59 × 388,418.30
  4. Step 4: Simplify right side
    690,224.30x = 369,971,378,844.90
  5. Step 5: Solve for x
    x = 369,971,378,844.90/690,224.30
  6. Step 6: Final answer
    x = 536,016.16

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Double scale
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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.