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Finding the Fourth Proportional to 306,356.16, 422,767.44 and 172,220.16

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Solution

The fourth proportional to 306,356.16, 422,767.44 and 172,220.16 is: 237,661.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,356.16 : 422,767.44 = 172,220.16 : x
  2. Step 2: Convert to fraction form
    306,356.16/422,767.44 = 172,220.16/x
  3. Step 3: Cross multiply
    306,356.16x = 422,767.44 × 172,220.16
  4. Step 4: Simplify right side
    306,356.16x = 72,809,076,159.59
  5. Step 5: Solve for x
    x = 72,809,076,159.59/306,356.16
  6. Step 6: Final answer
    x = 237,661.54

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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.