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Finding the Fourth Proportional to 449,018.40, 619,751.76 and 258,142.68

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Solution

The fourth proportional to 449,018.40, 619,751.76 and 258,142.68 is: 356,298.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,018.40 : 619,751.76 = 258,142.68 : x
  2. Step 2: Convert to fraction form
    449,018.40/619,751.76 = 258,142.68/x
  3. Step 3: Cross multiply
    449,018.40x = 619,751.76 × 258,142.68
  4. Step 4: Simplify right side
    449,018.40x = 159,984,380,261.12
  5. Step 5: Solve for x
    x = 159,984,380,261.12/449,018.40
  6. Step 6: Final answer
    x = 356,298.05

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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.