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Finding the Fourth Proportional to 420,199.63, 630,304.93 and 139,716.88

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Solution

The fourth proportional to 420,199.63, 630,304.93 and 139,716.88 is: 209,577.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,199.63 : 630,304.93 = 139,716.88 : x
  2. Step 2: Convert to fraction form
    420,199.63/630,304.93 = 139,716.88/x
  3. Step 3: Cross multiply
    420,199.63x = 630,304.93 × 139,716.88
  4. Step 4: Simplify right side
    420,199.63x = 88,064,238,268.22
  5. Step 5: Solve for x
    x = 88,064,238,268.22/420,199.63
  6. Step 6: Final answer
    x = 209,577.14

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1.5x scale

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.