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Finding the Fourth Proportional to 347,280.40, 520,920.60 and 326,285.20

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Solution

The fourth proportional to 347,280.40, 520,920.60 and 326,285.20 is: 489,427.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,280.40 : 520,920.60 = 326,285.20 : x
  2. Step 2: Convert to fraction form
    347,280.40/520,920.60 = 326,285.20/x
  3. Step 3: Cross multiply
    347,280.40x = 520,920.60 × 326,285.20
  4. Step 4: Simplify right side
    347,280.40x = 169,968,682,155.12
  5. Step 5: Solve for x
    x = 169,968,682,155.12/347,280.40
  6. Step 6: Final answer
    x = 489,427.80

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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.