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Finding the Fourth Proportional to 690,104.64, 952,124.58 and 388,240.32

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Solution

The fourth proportional to 690,104.64, 952,124.58 and 388,240.32 is: 535,647.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,104.64 : 952,124.58 = 388,240.32 : x
  2. Step 2: Convert to fraction form
    690,104.64/952,124.58 = 388,240.32/x
  3. Step 3: Cross multiply
    690,104.64x = 952,124.58 × 388,240.32
  4. Step 4: Simplify right side
    690,104.64x = 369,653,151,619.07
  5. Step 5: Solve for x
    x = 369,653,151,619.07/690,104.64
  6. Step 6: Final answer
    x = 535,647.97

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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.