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Finding the Fourth Proportional to 572,840.70, 860,179.05 and 455,487.90

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Solution

The fourth proportional to 572,840.70, 860,179.05 and 455,487.90 is: 683,961.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,840.70 : 860,179.05 = 455,487.90 : x
  2. Step 2: Convert to fraction form
    572,840.70/860,179.05 = 455,487.90/x
  3. Step 3: Cross multiply
    572,840.70x = 860,179.05 × 455,487.90
  4. Step 4: Simplify right side
    572,840.70x = 391,801,149,108.50
  5. Step 5: Solve for x
    x = 391,801,149,108.50/572,840.70
  6. Step 6: Final answer
    x = 683,961.79

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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.