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Finding the Fourth Proportional to 620,648.40, 931,145.40 and 305,115.60

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Solution

The fourth proportional to 620,648.40, 931,145.40 and 305,115.60 is: 457,758.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,648.40 : 931,145.40 = 305,115.60 : x
  2. Step 2: Convert to fraction form
    620,648.40/931,145.40 = 305,115.60/x
  3. Step 3: Cross multiply
    620,648.40x = 931,145.40 × 305,115.60
  4. Step 4: Simplify right side
    620,648.40x = 284,106,987,408.24
  5. Step 5: Solve for x
    x = 284,106,987,408.24/620,648.40
  6. Step 6: Final answer
    x = 457,758.35

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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.