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Finding the Fourth Proportional to 555,408.84, 765,890.87 and 475,102.20

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Solution

The fourth proportional to 555,408.84, 765,890.87 and 475,102.20 is: 655,150.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,408.84 : 765,890.87 = 475,102.20 : x
  2. Step 2: Convert to fraction form
    555,408.84/765,890.87 = 475,102.20/x
  3. Step 3: Cross multiply
    555,408.84x = 765,890.87 × 475,102.20
  4. Step 4: Simplify right side
    555,408.84x = 363,876,434,921.40
  5. Step 5: Solve for x
    x = 363,876,434,921.40/555,408.84
  6. Step 6: Final answer
    x = 655,150.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.