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Finding the Fourth Proportional to 630,380.21, 869,907.42 and 343,900.22

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Solution

The fourth proportional to 630,380.21, 869,907.42 and 343,900.22 is: 474,572.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,380.21 : 869,907.42 = 343,900.22 : x
  2. Step 2: Convert to fraction form
    630,380.21/869,907.42 = 343,900.22/x
  3. Step 3: Cross multiply
    630,380.21x = 869,907.42 × 343,900.22
  4. Step 4: Simplify right side
    630,380.21x = 299,161,348,768.10
  5. Step 5: Solve for x
    x = 299,161,348,768.10/630,380.21
  6. Step 6: Final answer
    x = 474,572.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.