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Finding the Fourth Proportional to 489,145.60, 733,718.40 and 421,494.40

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Solution

The fourth proportional to 489,145.60, 733,718.40 and 421,494.40 is: 632,241.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,145.60 : 733,718.40 = 421,494.40 : x
  2. Step 2: Convert to fraction form
    489,145.60/733,718.40 = 421,494.40/x
  3. Step 3: Cross multiply
    489,145.60x = 733,718.40 × 421,494.40
  4. Step 4: Simplify right side
    489,145.60x = 309,258,196,776.96
  5. Step 5: Solve for x
    x = 309,258,196,776.96/489,145.60
  6. Step 6: Final answer
    x = 632,241.60

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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.