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Finding the Fourth Proportional to 662,430.10, 993,973.20 and 378,338.80

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Solution

The fourth proportional to 662,430.10, 993,973.20 and 378,338.80 is: 567,695.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,430.10 : 993,973.20 = 378,338.80 : x
  2. Step 2: Convert to fraction form
    662,430.10/993,973.20 = 378,338.80/x
  3. Step 3: Cross multiply
    662,430.10x = 993,973.20 × 378,338.80
  4. Step 4: Simplify right side
    662,430.10x = 376,058,627,720.16
  5. Step 5: Solve for x
    x = 376,058,627,720.16/662,430.10
  6. Step 6: Final answer
    x = 567,695.56

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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.