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Finding the Fourth Proportional to 661,062,709.60, 991,470,734 and 267,486,395.16

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Solution

The fourth proportional to 661,062,709.60, 991,470,734 and 267,486,395.16 is: 401,179,689.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,062,709.60 : 991,470,734 = 267,486,395.16 : x
  2. Step 2: Convert to fraction form
    661,062,709.60/991,470,734 = 267,486,395.16/x
  3. Step 3: Cross multiply
    661,062,709.60x = 991,470,734 × 267,486,395.16
  4. Step 4: Simplify right side
    661,062,709.60x = 265,204,932,544,299,232
  5. Step 5: Solve for x
    x = 265,204,932,544,299,232/661,062,709.60
  6. Step 6: Final answer
    x = 401,179,689.45

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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.