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Finding the Fourth Proportional to 443,312.60, 664,968.90 and 256,105.40

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Solution

The fourth proportional to 443,312.60, 664,968.90 and 256,105.40 is: 384,158.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,312.60 : 664,968.90 = 256,105.40 : x
  2. Step 2: Convert to fraction form
    443,312.60/664,968.90 = 256,105.40/x
  3. Step 3: Cross multiply
    443,312.60x = 664,968.90 × 256,105.40
  4. Step 4: Simplify right side
    443,312.60x = 170,302,126,122.06
  5. Step 5: Solve for x
    x = 170,302,126,122.06/443,312.60
  6. Step 6: Final answer
    x = 384,158.10

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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.