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Finding the Fourth Proportional to 308,222.45, 425,345.64 and 172,256.32

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Solution

The fourth proportional to 308,222.45, 425,345.64 and 172,256.32 is: 237,712.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,222.45 : 425,345.64 = 172,256.32 : x
  2. Step 2: Convert to fraction form
    308,222.45/425,345.64 = 172,256.32/x
  3. Step 3: Cross multiply
    308,222.45x = 425,345.64 × 172,256.32
  4. Step 4: Simplify right side
    308,222.45x = 73,268,475,771.34
  5. Step 5: Solve for x
    x = 73,268,475,771.34/308,222.45
  6. Step 6: Final answer
    x = 237,712.97

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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.