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Finding the Fourth Proportional to 891,010.80, 1,336,386.60 and 259,858.80

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Solution

The fourth proportional to 891,010.80, 1,336,386.60 and 259,858.80 is: 389,750.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,010.80 : 1,336,386.60 = 259,858.80 : x
  2. Step 2: Convert to fraction form
    891,010.80/1,336,386.60 = 259,858.80/x
  3. Step 3: Cross multiply
    891,010.80x = 1,336,386.60 × 259,858.80
  4. Step 4: Simplify right side
    891,010.80x = 347,271,818,212.08
  5. Step 5: Solve for x
    x = 347,271,818,212.08/891,010.80
  6. Step 6: Final answer
    x = 389,750.40

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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.