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Finding the Fourth Proportional to 438,609.40, 657,914.10 and 281,145.40

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Solution

The fourth proportional to 438,609.40, 657,914.10 and 281,145.40 is: 421,718.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,609.40 : 657,914.10 = 281,145.40 : x
  2. Step 2: Convert to fraction form
    438,609.40/657,914.10 = 281,145.40/x
  3. Step 3: Cross multiply
    438,609.40x = 657,914.10 × 281,145.40
  4. Step 4: Simplify right side
    438,609.40x = 184,969,522,810.14
  5. Step 5: Solve for x
    x = 184,969,522,810.14/438,609.40
  6. Step 6: Final answer
    x = 421,718.10

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.