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Finding the Fourth Proportional to 421,260.60, 630,662.10 and 408,972.60

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Solution

The fourth proportional to 421,260.60, 630,662.10 and 408,972.60 is: 612,265.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,260.60 : 630,662.10 = 408,972.60 : x
  2. Step 2: Convert to fraction form
    421,260.60/630,662.10 = 408,972.60/x
  3. Step 3: Cross multiply
    421,260.60x = 630,662.10 × 408,972.60
  4. Step 4: Simplify right side
    421,260.60x = 257,923,518,758.46
  5. Step 5: Solve for x
    x = 257,923,518,758.46/421,260.60
  6. Step 6: Final answer
    x = 612,265.94

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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.