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Finding the Fourth Proportional to 572,791.20, 860,104.80 and 455,438.40

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Solution

The fourth proportional to 572,791.20, 860,104.80 and 455,438.40 is: 683,887.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,791.20 : 860,104.80 = 455,438.40 : x
  2. Step 2: Convert to fraction form
    572,791.20/860,104.80 = 455,438.40/x
  3. Step 3: Cross multiply
    572,791.20x = 860,104.80 × 455,438.40
  4. Step 4: Simplify right side
    572,791.20x = 391,724,753,944.32
  5. Step 5: Solve for x
    x = 391,724,753,944.32/572,791.20
  6. Step 6: Final answer
    x = 683,887.52

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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.