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Finding the Fourth Proportional to 647,355,985.40, 971,033,978.10 and 572,529,092.60

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Solution

The fourth proportional to 647,355,985.40, 971,033,978.10 and 572,529,092.60 is: 858,793,638.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,355,985.40 : 971,033,978.10 = 572,529,092.60 : x
  2. Step 2: Convert to fraction form
    647,355,985.40/971,033,978.10 = 572,529,092.60/x
  3. Step 3: Cross multiply
    647,355,985.40x = 971,033,978.10 × 572,529,092.60
  4. Step 4: Simplify right side
    647,355,985.40x = 555,945,202,365,361,280
  5. Step 5: Solve for x
    x = 555,945,202,365,361,280/647,355,985.40
  6. Step 6: Final answer
    x = 858,793,638.90

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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.