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Finding the Fourth Proportional to 612,963,018.84, 919,767,372.66 and 354,359,891.64

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Solution

The fourth proportional to 612,963,018.84, 919,767,372.66 and 354,359,891.64 is: 531,726,476.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,963,018.84 : 919,767,372.66 = 354,359,891.64 : x
  2. Step 2: Convert to fraction form
    612,963,018.84/919,767,372.66 = 354,359,891.64/x
  3. Step 3: Cross multiply
    612,963,018.84x = 919,767,372.66 × 354,359,891.64
  4. Step 4: Simplify right side
    612,963,018.84x = 325,928,666,509,805,056
  5. Step 5: Solve for x
    x = 325,928,666,509,805,056/612,963,018.84
  6. Step 6: Final answer
    x = 531,726,476.95

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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.