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Finding the Fourth Proportional to 458,615.40, 687,339.90 and 221,447.40

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Solution

The fourth proportional to 458,615.40, 687,339.90 and 221,447.40 is: 331,889.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,615.40 : 687,339.90 = 221,447.40 : x
  2. Step 2: Convert to fraction form
    458,615.40/687,339.90 = 221,447.40/x
  3. Step 3: Cross multiply
    458,615.40x = 687,339.90 × 221,447.40
  4. Step 4: Simplify right side
    458,615.40x = 152,209,633,771.26
  5. Step 5: Solve for x
    x = 152,209,633,771.26/458,615.40
  6. Step 6: Final answer
    x = 331,889.50

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.