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Finding the Fourth Proportional to 421,690.35, 582,007.60 and 249,703.79

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Solution

The fourth proportional to 421,690.35, 582,007.60 and 249,703.79 is: 344,635.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,690.35 : 582,007.60 = 249,703.79 : x
  2. Step 2: Convert to fraction form
    421,690.35/582,007.60 = 249,703.79/x
  3. Step 3: Cross multiply
    421,690.35x = 582,007.60 × 249,703.79
  4. Step 4: Simplify right side
    421,690.35x = 145,329,503,270.08
  5. Step 5: Solve for x
    x = 145,329,503,270.08/421,690.35
  6. Step 6: Final answer
    x = 344,635.59

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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.