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Finding the Fourth Proportional to 449,372.61, 619,941.60 and 258,345.45

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Solution

The fourth proportional to 449,372.61, 619,941.60 and 258,345.45 is: 356,405.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,372.61 : 619,941.60 = 258,345.45 : x
  2. Step 2: Convert to fraction form
    449,372.61/619,941.60 = 258,345.45/x
  3. Step 3: Cross multiply
    449,372.61x = 619,941.60 × 258,345.45
  4. Step 4: Simplify right side
    449,372.61x = 160,159,091,625.72
  5. Step 5: Solve for x
    x = 160,159,091,625.72/449,372.61
  6. Step 6: Final answer
    x = 356,405.99

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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.