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Finding the Fourth Proportional to 777,636.80, 1,166,280.15 and 279,000.80

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Solution

The fourth proportional to 777,636.80, 1,166,280.15 and 279,000.80 is: 418,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,636.80 : 1,166,280.15 = 279,000.80 : x
  2. Step 2: Convert to fraction form
    777,636.80/1,166,280.15 = 279,000.80/x
  3. Step 3: Cross multiply
    777,636.80x = 1,166,280.15 × 279,000.80
  4. Step 4: Simplify right side
    777,636.80x = 325,393,094,874.12
  5. Step 5: Solve for x
    x = 325,393,094,874.12/777,636.80
  6. Step 6: Final answer
    x = 418,438.40

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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.