Home / 858,830.40-1,288,245.60-438,926.40

Finding the Fourth Proportional to 858,830.40, 1,288,245.60 and 438,926.40

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Solution

The fourth proportional to 858,830.40, 1,288,245.60 and 438,926.40 is: 658,389.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,830.40 : 1,288,245.60 = 438,926.40 : x
  2. Step 2: Convert to fraction form
    858,830.40/1,288,245.60 = 438,926.40/x
  3. Step 3: Cross multiply
    858,830.40x = 1,288,245.60 × 438,926.40
  4. Step 4: Simplify right side
    858,830.40x = 565,445,003,523.84
  5. Step 5: Solve for x
    x = 565,445,003,523.84/858,830.40
  6. Step 6: Final answer
    x = 658,389.60

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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.