Home / 711,479.11-981,828.27-389,186.38

Finding the Fourth Proportional to 711,479.11, 981,828.27 and 389,186.38

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Solution

The fourth proportional to 711,479.11, 981,828.27 and 389,186.38 is: 537,070.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,479.11 : 981,828.27 = 389,186.38 : x
  2. Step 2: Convert to fraction form
    711,479.11/981,828.27 = 389,186.38/x
  3. Step 3: Cross multiply
    711,479.11x = 981,828.27 × 389,186.38
  4. Step 4: Simplify right side
    711,479.11x = 382,114,188,237.03
  5. Step 5: Solve for x
    x = 382,114,188,237.03/711,479.11
  6. Step 6: Final answer
    x = 537,070.15

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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.