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Finding the Fourth Proportional to 692,749,721.40, 955,994,795.10 and 379,495,071.60

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Solution

The fourth proportional to 692,749,721.40, 955,994,795.10 and 379,495,071.60 is: 523,703,297.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,749,721.40 : 955,994,795.10 = 379,495,071.60 : x
  2. Step 2: Convert to fraction form
    692,749,721.40/955,994,795.10 = 379,495,071.60/x
  3. Step 3: Cross multiply
    692,749,721.40x = 955,994,795.10 × 379,495,071.60
  4. Step 4: Simplify right side
    692,749,721.40x = 362,795,313,215,701,888
  5. Step 5: Solve for x
    x = 362,795,313,215,701,888/692,749,721.40
  6. Step 6: Final answer
    x = 523,703,297.18

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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.