Home / 711,028.96-981,209.52-388,740.32

Finding the Fourth Proportional to 711,028.96, 981,209.52 and 388,740.32

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Solution

The fourth proportional to 711,028.96, 981,209.52 and 388,740.32 is: 536,455.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,028.96 : 981,209.52 = 388,740.32 : x
  2. Step 2: Convert to fraction form
    711,028.96/981,209.52 = 388,740.32/x
  3. Step 3: Cross multiply
    711,028.96x = 981,209.52 × 388,740.32
  4. Step 4: Simplify right side
    711,028.96x = 381,435,702,791.85
  5. Step 5: Solve for x
    x = 381,435,702,791.85/711,028.96
  6. Step 6: Final answer
    x = 536,455.93

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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.