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Finding the Fourth Proportional to 628,408.20, 942,612.30 and 488,267.40

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Solution

The fourth proportional to 628,408.20, 942,612.30 and 488,267.40 is: 732,401.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,408.20 : 942,612.30 = 488,267.40 : x
  2. Step 2: Convert to fraction form
    628,408.20/942,612.30 = 488,267.40/x
  3. Step 3: Cross multiply
    628,408.20x = 942,612.30 × 488,267.40
  4. Step 4: Simplify right side
    628,408.20x = 460,246,856,929.02
  5. Step 5: Solve for x
    x = 460,246,856,929.02/628,408.20
  6. Step 6: Final answer
    x = 732,401.10

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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.