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Finding the Fourth Proportional to 402,768.55, 555,811.50 and 219,003.13

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Solution

The fourth proportional to 402,768.55, 555,811.50 and 219,003.13 is: 302,219.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,768.55 : 555,811.50 = 219,003.13 : x
  2. Step 2: Convert to fraction form
    402,768.55/555,811.50 = 219,003.13/x
  3. Step 3: Cross multiply
    402,768.55x = 555,811.50 × 219,003.13
  4. Step 4: Simplify right side
    402,768.55x = 121,724,458,190.00
  5. Step 5: Solve for x
    x = 121,724,458,190.00/402,768.55
  6. Step 6: Final answer
    x = 302,219.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.