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Finding the Fourth Proportional to 692,749,720.40, 955,994,793.72 and 379,495,070.60

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Solution

The fourth proportional to 692,749,720.40, 955,994,793.72 and 379,495,070.60 is: 523,703,295.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,749,720.40 : 955,994,793.72 = 379,495,070.60 : x
  2. Step 2: Convert to fraction form
    692,749,720.40/955,994,793.72 = 379,495,070.60/x
  3. Step 3: Cross multiply
    692,749,720.40x = 955,994,793.72 × 379,495,070.60
  4. Step 4: Simplify right side
    692,749,720.40x = 362,795,311,736,003,840
  5. Step 5: Solve for x
    x = 362,795,311,736,003,840/692,749,720.40
  6. Step 6: Final answer
    x = 523,703,295.80

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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.