Home / 711,109.12-981,361.08-388,799.98

Finding the Fourth Proportional to 711,109.12, 981,361.08 and 388,799.98

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Solution

The fourth proportional to 711,109.12, 981,361.08 and 388,799.98 is: 536,560.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,109.12 : 981,361.08 = 388,799.98 : x
  2. Step 2: Convert to fraction form
    711,109.12/981,361.08 = 388,799.98/x
  3. Step 3: Cross multiply
    711,109.12x = 981,361.08 × 388,799.98
  4. Step 4: Simplify right side
    711,109.12x = 381,553,168,276.78
  5. Step 5: Solve for x
    x = 381,553,168,276.78/711,109.12
  6. Step 6: Final answer
    x = 536,560.65

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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.