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Finding the Fourth Proportional to 710,906.16, 981,074.34 and 388,609.32

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Solution

The fourth proportional to 710,906.16, 981,074.34 and 388,609.32 is: 536,293.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,906.16 : 981,074.34 = 388,609.32 : x
  2. Step 2: Convert to fraction form
    710,906.16/981,074.34 = 388,609.32/x
  3. Step 3: Cross multiply
    710,906.16x = 981,074.34 × 388,609.32
  4. Step 4: Simplify right side
    710,906.16x = 381,254,632,136.85
  5. Step 5: Solve for x
    x = 381,254,632,136.85/710,906.16
  6. Step 6: Final answer
    x = 536,293.89

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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.