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Finding the Fourth Proportional to 642,806.78, 887,080.57 and 367,201.13

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Solution

The fourth proportional to 642,806.78, 887,080.57 and 367,201.13 is: 506,741.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,806.78 : 887,080.57 = 367,201.13 : x
  2. Step 2: Convert to fraction form
    642,806.78/887,080.57 = 367,201.13/x
  3. Step 3: Cross multiply
    642,806.78x = 887,080.57 × 367,201.13
  4. Step 4: Simplify right side
    642,806.78x = 325,736,982,351.64
  5. Step 5: Solve for x
    x = 325,736,982,351.64/642,806.78
  6. Step 6: Final answer
    x = 506,741.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.