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Finding the Fourth Proportional to 443,000.70, 664,501.05 and 390,512.70

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Solution

The fourth proportional to 443,000.70, 664,501.05 and 390,512.70 is: 585,769.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,000.70 : 664,501.05 = 390,512.70 : x
  2. Step 2: Convert to fraction form
    443,000.70/664,501.05 = 390,512.70/x
  3. Step 3: Cross multiply
    443,000.70x = 664,501.05 × 390,512.70
  4. Step 4: Simplify right side
    443,000.70x = 259,496,099,188.34
  5. Step 5: Solve for x
    x = 259,496,099,188.34/443,000.70
  6. Step 6: Final answer
    x = 585,769.05

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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.