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Finding the Fourth Proportional to 939,287.08, 1,408,989.20 and 265,420

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Solution

The fourth proportional to 939,287.08, 1,408,989.20 and 265,420 is: 398,146.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,287.08 : 1,408,989.20 = 265,420 : x
  2. Step 2: Convert to fraction form
    939,287.08/1,408,989.20 = 265,420/x
  3. Step 3: Cross multiply
    939,287.08x = 1,408,989.20 × 265,420
  4. Step 4: Simplify right side
    939,287.08x = 373,973,913,464
  5. Step 5: Solve for x
    x = 373,973,913,464/939,287.08
  6. Step 6: Final answer
    x = 398,146.55

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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.