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Finding the Fourth Proportional to 711,052.32, 981,253.97 and 388,783.22

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Solution

The fourth proportional to 711,052.32, 981,253.97 and 388,783.22 is: 536,521.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,052.32 : 981,253.97 = 388,783.22 : x
  2. Step 2: Convert to fraction form
    711,052.32/981,253.97 = 388,783.22/x
  3. Step 3: Cross multiply
    711,052.32x = 981,253.97 × 388,783.22
  4. Step 4: Simplify right side
    711,052.32x = 381,495,076,555.36
  5. Step 5: Solve for x
    x = 381,495,076,555.36/711,052.32
  6. Step 6: Final answer
    x = 536,521.81

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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.