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Finding the Fourth Proportional to 562,455.01, 843,184.18 and 420,128.47

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Solution

The fourth proportional to 562,455.01, 843,184.18 and 420,128.47 is: 629,820.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    562,455.01 : 843,184.18 = 420,128.47 : x
  2. Step 2: Convert to fraction form
    562,455.01/843,184.18 = 420,128.47/x
  3. Step 3: Cross multiply
    562,455.01x = 843,184.18 × 420,128.47
  4. Step 4: Simplify right side
    562,455.01x = 354,245,681,050.75
  5. Step 5: Solve for x
    x = 354,245,681,050.75/562,455.01
  6. Step 6: Final answer
    x = 629,820.47

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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.