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Finding the Fourth Proportional to 321,780.60, 482,670.90 and 247,276.80

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Solution

The fourth proportional to 321,780.60, 482,670.90 and 247,276.80 is: 370,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,780.60 : 482,670.90 = 247,276.80 : x
  2. Step 2: Convert to fraction form
    321,780.60/482,670.90 = 247,276.80/x
  3. Step 3: Cross multiply
    321,780.60x = 482,670.90 × 247,276.80
  4. Step 4: Simplify right side
    321,780.60x = 119,353,315,605.12
  5. Step 5: Solve for x
    x = 119,353,315,605.12/321,780.60
  6. Step 6: Final answer
    x = 370,915.20

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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.