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Finding the Fourth Proportional to 443,323.70, 664,985.55 and 256,238.90

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Solution

The fourth proportional to 443,323.70, 664,985.55 and 256,238.90 is: 384,358.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,323.70 : 664,985.55 = 256,238.90 : x
  2. Step 2: Convert to fraction form
    443,323.70/664,985.55 = 256,238.90/x
  3. Step 3: Cross multiply
    443,323.70x = 664,985.55 × 256,238.90
  4. Step 4: Simplify right side
    443,323.70x = 170,395,165,847.90
  5. Step 5: Solve for x
    x = 170,395,165,847.90/443,323.70
  6. Step 6: Final answer
    x = 384,358.35

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Double scale
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Similar ratio
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1.5x scale

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.