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Finding the Fourth Proportional to 286,045.20, 428,938.20 and 108,493.20

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Solution

The fourth proportional to 286,045.20, 428,938.20 and 108,493.20 is: 162,690.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,045.20 : 428,938.20 = 108,493.20 : x
  2. Step 2: Convert to fraction form
    286,045.20/428,938.20 = 108,493.20/x
  3. Step 3: Cross multiply
    286,045.20x = 428,938.20 × 108,493.20
  4. Step 4: Simplify right side
    286,045.20x = 46,536,877,920.24
  5. Step 5: Solve for x
    x = 46,536,877,920.24/286,045.20
  6. Step 6: Final answer
    x = 162,690.64

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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.