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Finding the Fourth Proportional to 399,676.48, 599,339.04 and 212,643.52

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Solution

The fourth proportional to 399,676.48, 599,339.04 and 212,643.52 is: 318,871.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,676.48 : 599,339.04 = 212,643.52 : x
  2. Step 2: Convert to fraction form
    399,676.48/599,339.04 = 212,643.52/x
  3. Step 3: Cross multiply
    399,676.48x = 599,339.04 × 212,643.52
  4. Step 4: Simplify right side
    399,676.48x = 127,445,563,139.02
  5. Step 5: Solve for x
    x = 127,445,563,139.02/399,676.48
  6. Step 6: Final answer
    x = 318,871.81

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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.