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Finding the Fourth Proportional to 397,840.45, 549,030.42 and 216,564.57

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Solution

The fourth proportional to 397,840.45, 549,030.42 and 216,564.57 is: 298,864.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,840.45 : 549,030.42 = 216,564.57 : x
  2. Step 2: Convert to fraction form
    397,840.45/549,030.42 = 216,564.57/x
  3. Step 3: Cross multiply
    397,840.45x = 549,030.42 × 216,564.57
  4. Step 4: Simplify right side
    397,840.45x = 118,900,536,824.22
  5. Step 5: Solve for x
    x = 118,900,536,824.22/397,840.45
  6. Step 6: Final answer
    x = 298,864.88

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