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Finding the Fourth Proportional to 243,012.80, 339,430.60 and 243,012.80

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Solution

The fourth proportional to 243,012.80, 339,430.60 and 243,012.80 is: 339,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,012.80 : 339,430.60 = 243,012.80 : x
  2. Step 2: Convert to fraction form
    243,012.80/339,430.60 = 243,012.80/x
  3. Step 3: Cross multiply
    243,012.80x = 339,430.60 × 243,012.80
  4. Step 4: Simplify right side
    243,012.80x = 82,485,980,511.68
  5. Step 5: Solve for x
    x = 82,485,980,511.68/243,012.80
  6. Step 6: Final answer
    x = 339,430.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.