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Finding the Fourth Proportional to 289,570.21, 399,606.62 and 162,246.72

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Solution

The fourth proportional to 289,570.21, 399,606.62 and 162,246.72 is: 223,900.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,570.21 : 399,606.62 = 162,246.72 : x
  2. Step 2: Convert to fraction form
    289,570.21/399,606.62 = 162,246.72/x
  3. Step 3: Cross multiply
    289,570.21x = 399,606.62 × 162,246.72
  4. Step 4: Simplify right side
    289,570.21x = 64,834,863,385.29
  5. Step 5: Solve for x
    x = 64,834,863,385.29/289,570.21
  6. Step 6: Final answer
    x = 223,900.32

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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.