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Finding the Fourth Proportional to 439,259.40, 658,889.10 and 289,668.60

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Solution

The fourth proportional to 439,259.40, 658,889.10 and 289,668.60 is: 434,502.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,259.40 : 658,889.10 = 289,668.60 : x
  2. Step 2: Convert to fraction form
    439,259.40/658,889.10 = 289,668.60/x
  3. Step 3: Cross multiply
    439,259.40x = 658,889.10 × 289,668.60
  4. Step 4: Simplify right side
    439,259.40x = 190,859,483,152.26
  5. Step 5: Solve for x
    x = 190,859,483,152.26/439,259.40
  6. Step 6: Final answer
    x = 434,502.90

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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.