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Finding the Fourth Proportional to 661,450,754.64, 912,888,961.56 and 379,303,610.16

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Solution

The fourth proportional to 661,450,754.64, 912,888,961.56 and 379,303,610.16 is: 523,488,825.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,450,754.64 : 912,888,961.56 = 379,303,610.16 : x
  2. Step 2: Convert to fraction form
    661,450,754.64/912,888,961.56 = 379,303,610.16/x
  3. Step 3: Cross multiply
    661,450,754.64x = 912,888,961.56 × 379,303,610.16
  4. Step 4: Simplify right side
    661,450,754.64x = 346,262,078,794,921,472
  5. Step 5: Solve for x
    x = 346,262,078,794,921,472/661,450,754.64
  6. Step 6: Final answer
    x = 523,488,825.68

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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.