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Finding the Fourth Proportional to 421,818.90, 632,783.85 and 155,766.30

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Solution

The fourth proportional to 421,818.90, 632,783.85 and 155,766.30 is: 233,669.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,818.90 : 632,783.85 = 155,766.30 : x
  2. Step 2: Convert to fraction form
    421,818.90/632,783.85 = 155,766.30/x
  3. Step 3: Cross multiply
    421,818.90x = 632,783.85 × 155,766.30
  4. Step 4: Simplify right side
    421,818.90x = 98,566,399,014.26
  5. Step 5: Solve for x
    x = 98,566,399,014.26/421,818.90
  6. Step 6: Final answer
    x = 233,669.94

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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.