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Finding the Fourth Proportional to 603,390.80, 905,345.40 and 307,902.80

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Solution

The fourth proportional to 603,390.80, 905,345.40 and 307,902.80 is: 461,986.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,390.80 : 905,345.40 = 307,902.80 : x
  2. Step 2: Convert to fraction form
    603,390.80/905,345.40 = 307,902.80/x
  3. Step 3: Cross multiply
    603,390.80x = 905,345.40 × 307,902.80
  4. Step 4: Simplify right side
    603,390.80x = 278,758,383,627.12
  5. Step 5: Solve for x
    x = 278,758,383,627.12/603,390.80
  6. Step 6: Final answer
    x = 461,986.47

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1.5x scale

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.