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Finding the Fourth Proportional to 449,445.78, 620,484.30 and 306,415.98

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Solution

The fourth proportional to 449,445.78, 620,484.30 and 306,415.98 is: 423,023.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,445.78 : 620,484.30 = 306,415.98 : x
  2. Step 2: Convert to fraction form
    449,445.78/620,484.30 = 306,415.98/x
  3. Step 3: Cross multiply
    449,445.78x = 620,484.30 × 306,415.98
  4. Step 4: Simplify right side
    449,445.78x = 190,126,304,859.11
  5. Step 5: Solve for x
    x = 190,126,304,859.11/449,445.78
  6. Step 6: Final answer
    x = 423,023.90

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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.