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Finding the Fourth Proportional to 264,926.64, 397,379.88 and 87,428.40

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Solution

The fourth proportional to 264,926.64, 397,379.88 and 87,428.40 is: 131,139.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,926.64 : 397,379.88 = 87,428.40 : x
  2. Step 2: Convert to fraction form
    264,926.64/397,379.88 = 87,428.40/x
  3. Step 3: Cross multiply
    264,926.64x = 397,379.88 × 87,428.40
  4. Step 4: Simplify right side
    264,926.64x = 34,742,287,100.59
  5. Step 5: Solve for x
    x = 34,742,287,100.59/264,926.64
  6. Step 6: Final answer
    x = 131,139.27

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Why These Related Problems?

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