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Finding the Fourth Proportional to 702,486.80, 1,053,730.20 and 421,859.60

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Solution

The fourth proportional to 702,486.80, 1,053,730.20 and 421,859.60 is: 632,789.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,486.80 : 1,053,730.20 = 421,859.60 : x
  2. Step 2: Convert to fraction form
    702,486.80/1,053,730.20 = 421,859.60/x
  3. Step 3: Cross multiply
    702,486.80x = 1,053,730.20 × 421,859.60
  4. Step 4: Simplify right side
    702,486.80x = 444,526,200,679.92
  5. Step 5: Solve for x
    x = 444,526,200,679.92/702,486.80
  6. Step 6: Final answer
    x = 632,789.40

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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.