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Finding the Fourth Proportional to 471,266.40, 706,899.60 and 420,090.60

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Solution

The fourth proportional to 471,266.40, 706,899.60 and 420,090.60 is: 630,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    471,266.40 : 706,899.60 = 420,090.60 : x
  2. Step 2: Convert to fraction form
    471,266.40/706,899.60 = 420,090.60/x
  3. Step 3: Cross multiply
    471,266.40x = 706,899.60 × 420,090.60
  4. Step 4: Simplify right side
    471,266.40x = 296,961,877,103.76
  5. Step 5: Solve for x
    x = 296,961,877,103.76/471,266.40
  6. Step 6: Final answer
    x = 630,135.90

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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.