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Finding the Fourth Proportional to 443,342.40, 665,013.60 and 385,605.60

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Solution

The fourth proportional to 443,342.40, 665,013.60 and 385,605.60 is: 578,408.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,342.40 : 665,013.60 = 385,605.60 : x
  2. Step 2: Convert to fraction form
    443,342.40/665,013.60 = 385,605.60/x
  3. Step 3: Cross multiply
    443,342.40x = 665,013.60 × 385,605.60
  4. Step 4: Simplify right side
    443,342.40x = 256,432,968,236.16
  5. Step 5: Solve for x
    x = 256,432,968,236.16/443,342.40
  6. Step 6: Final answer
    x = 578,408.40

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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.