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Finding the Fourth Proportional to 421,259.60, 630,660.60 and 408,971.60

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Solution

The fourth proportional to 421,259.60, 630,660.60 and 408,971.60 is: 612,264.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,259.60 : 630,660.60 = 408,971.60 : x
  2. Step 2: Convert to fraction form
    421,259.60/630,660.60 = 408,971.60/x
  3. Step 3: Cross multiply
    421,259.60x = 630,660.60 × 408,971.60
  4. Step 4: Simplify right side
    421,259.60x = 257,922,274,638.96
  5. Step 5: Solve for x
    x = 257,922,274,638.96/421,259.60
  6. Step 6: Final answer
    x = 612,264.44

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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.