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Finding the Fourth Proportional to 407,071.26, 561,390.69 and 254,123.64

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Solution

The fourth proportional to 407,071.26, 561,390.69 and 254,123.64 is: 350,461.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,071.26 : 561,390.69 = 254,123.64 : x
  2. Step 2: Convert to fraction form
    407,071.26/561,390.69 = 254,123.64/x
  3. Step 3: Cross multiply
    407,071.26x = 561,390.69 × 254,123.64
  4. Step 4: Simplify right side
    407,071.26x = 142,662,645,604.91
  5. Step 5: Solve for x
    x = 142,662,645,604.91/407,071.26
  6. Step 6: Final answer
    x = 350,461.11

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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.