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Finding the Fourth Proportional to 690,108.64, 952,130.10 and 388,244.32

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Solution

The fourth proportional to 690,108.64, 952,130.10 and 388,244.32 is: 535,653.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,108.64 : 952,130.10 = 388,244.32 : x
  2. Step 2: Convert to fraction form
    690,108.64/952,130.10 = 388,244.32/x
  3. Step 3: Cross multiply
    690,108.64x = 952,130.10 × 388,244.32
  4. Step 4: Simplify right side
    690,108.64x = 369,659,103,226.03
  5. Step 5: Solve for x
    x = 369,659,103,226.03/690,108.64
  6. Step 6: Final answer
    x = 535,653.49

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Double scale
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Similar ratio
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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.