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Finding the Fourth Proportional to 661,301.76, 991,978.56 and 345,544.32

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Solution

The fourth proportional to 661,301.76, 991,978.56 and 345,544.32 is: 518,330.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,301.76 : 991,978.56 = 345,544.32 : x
  2. Step 2: Convert to fraction form
    661,301.76/991,978.56 = 345,544.32/x
  3. Step 3: Cross multiply
    661,301.76x = 991,978.56 × 345,544.32
  4. Step 4: Simplify right side
    661,301.76x = 342,772,556,969.78
  5. Step 5: Solve for x
    x = 342,772,556,969.78/661,301.76
  6. Step 6: Final answer
    x = 518,330.02

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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.