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Finding the Fourth Proportional to 315,297.74, 434,961 and 186,149.72

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Solution

The fourth proportional to 315,297.74, 434,961 and 186,149.72 is: 256,798.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,297.74 : 434,961 = 186,149.72 : x
  2. Step 2: Convert to fraction form
    315,297.74/434,961 = 186,149.72/x
  3. Step 3: Cross multiply
    315,297.74x = 434,961 × 186,149.72
  4. Step 4: Simplify right side
    315,297.74x = 80,967,866,186.12
  5. Step 5: Solve for x
    x = 80,967,866,186.12/315,297.74
  6. Step 6: Final answer
    x = 256,798.12

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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.