Home / 711,384.63-981,734.16-389,094.73

Finding the Fourth Proportional to 711,384.63, 981,734.16 and 389,094.73

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Solution

The fourth proportional to 711,384.63, 981,734.16 and 389,094.73 is: 536,963.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,384.63 : 981,734.16 = 389,094.73 : x
  2. Step 2: Convert to fraction form
    711,384.63/981,734.16 = 389,094.73/x
  3. Step 3: Cross multiply
    711,384.63x = 981,734.16 × 389,094.73
  4. Step 4: Simplify right side
    711,384.63x = 381,987,587,916.98
  5. Step 5: Solve for x
    x = 381,987,587,916.98/711,384.63
  6. Step 6: Final answer
    x = 536,963.51

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Double scale
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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.