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Finding the Fourth Proportional to 644,955.20, 967,432.80 and 326,090.60

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Solution

The fourth proportional to 644,955.20, 967,432.80 and 326,090.60 is: 489,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,955.20 : 967,432.80 = 326,090.60 : x
  2. Step 2: Convert to fraction form
    644,955.20/967,432.80 = 326,090.60/x
  3. Step 3: Cross multiply
    644,955.20x = 967,432.80 × 326,090.60
  4. Step 4: Simplify right side
    644,955.20x = 315,470,742,211.68
  5. Step 5: Solve for x
    x = 315,470,742,211.68/644,955.20
  6. Step 6: Final answer
    x = 489,135.90

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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.