Home / 711,014.16-981,188.40-388,716.72

Finding the Fourth Proportional to 711,014.16, 981,188.40 and 388,716.72

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Solution

The fourth proportional to 711,014.16, 981,188.40 and 388,716.72 is: 536,422.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,014.16 : 981,188.40 = 388,716.72 : x
  2. Step 2: Convert to fraction form
    711,014.16/981,188.40 = 388,716.72/x
  3. Step 3: Cross multiply
    711,014.16x = 981,188.40 × 388,716.72
  4. Step 4: Simplify right side
    711,014.16x = 381,404,336,550.05
  5. Step 5: Solve for x
    x = 381,404,336,550.05/711,014.16
  6. Step 6: Final answer
    x = 536,422.98

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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.