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Finding the Fourth Proportional to 471,520.80, 706,820.40 and 421,754.40

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Solution

The fourth proportional to 471,520.80, 706,820.40 and 421,754.40 is: 632,219.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    471,520.80 : 706,820.40 = 421,754.40 : x
  2. Step 2: Convert to fraction form
    471,520.80/706,820.40 = 421,754.40/x
  3. Step 3: Cross multiply
    471,520.80x = 706,820.40 × 421,754.40
  4. Step 4: Simplify right side
    471,520.80x = 298,104,613,709.76
  5. Step 5: Solve for x
    x = 298,104,613,709.76/471,520.80
  6. Step 6: Final answer
    x = 632,219.43

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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.