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Finding the Fourth Proportional to 711,097.65, 981,308.07 and 388,804.32

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Solution

The fourth proportional to 711,097.65, 981,308.07 and 388,804.32 is: 536,546.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,097.65 : 981,308.07 = 388,804.32 : x
  2. Step 2: Convert to fraction form
    711,097.65/981,308.07 = 388,804.32/x
  3. Step 3: Cross multiply
    711,097.65x = 981,308.07 × 388,804.32
  4. Step 4: Simplify right side
    711,097.65x = 381,536,816,866.86
  5. Step 5: Solve for x
    x = 381,536,816,866.86/711,097.65
  6. Step 6: Final answer
    x = 536,546.31

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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.