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Finding the Fourth Proportional to 438,645.40, 657,968.10 and 281,181.40

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Solution

The fourth proportional to 438,645.40, 657,968.10 and 281,181.40 is: 421,772.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,645.40 : 657,968.10 = 281,181.40 : x
  2. Step 2: Convert to fraction form
    438,645.40/657,968.10 = 281,181.40/x
  3. Step 3: Cross multiply
    438,645.40x = 657,968.10 × 281,181.40
  4. Step 4: Simplify right side
    438,645.40x = 185,008,391,513.34
  5. Step 5: Solve for x
    x = 185,008,391,513.34/438,645.40
  6. Step 6: Final answer
    x = 421,772.10

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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.