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Finding the Fourth Proportional to 711,007.44, 981,208.80 and 388,731.12

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Solution

The fourth proportional to 711,007.44, 981,208.80 and 388,731.12 is: 536,459.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,007.44 : 981,208.80 = 388,731.12 : x
  2. Step 2: Convert to fraction form
    711,007.44/981,208.80 = 388,731.12/x
  3. Step 3: Cross multiply
    711,007.44x = 981,208.80 × 388,731.12
  4. Step 4: Simplify right side
    711,007.44x = 381,426,395,777.86
  5. Step 5: Solve for x
    x = 381,426,395,777.86/711,007.44
  6. Step 6: Final answer
    x = 536,459.08

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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.