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Finding the Fourth Proportional to 655,408.80, 983,145.60 and 340,480.80

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Solution

The fourth proportional to 655,408.80, 983,145.60 and 340,480.80 is: 510,738.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,408.80 : 983,145.60 = 340,480.80 : x
  2. Step 2: Convert to fraction form
    655,408.80/983,145.60 = 340,480.80/x
  3. Step 3: Cross multiply
    655,408.80x = 983,145.60 × 340,480.80
  4. Step 4: Simplify right side
    655,408.80x = 334,742,200,404.48
  5. Step 5: Solve for x
    x = 334,742,200,404.48/655,408.80
  6. Step 6: Final answer
    x = 510,738.03

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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.