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Finding the Fourth Proportional to 315,448.45, 435,313.09 and 179,479.42

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Solution

The fourth proportional to 315,448.45, 435,313.09 and 179,479.42 is: 247,678.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,448.45 : 435,313.09 = 179,479.42 : x
  2. Step 2: Convert to fraction form
    315,448.45/435,313.09 = 179,479.42/x
  3. Step 3: Cross multiply
    315,448.45x = 435,313.09 × 179,479.42
  4. Step 4: Simplify right side
    315,448.45x = 78,129,740,911.61
  5. Step 5: Solve for x
    x = 78,129,740,911.61/315,448.45
  6. Step 6: Final answer
    x = 247,678.32

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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.