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Finding the Fourth Proportional to 493,884.80, 740,827.20 and 138,910.40

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Solution

The fourth proportional to 493,884.80, 740,827.20 and 138,910.40 is: 208,365.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,884.80 : 740,827.20 = 138,910.40 : x
  2. Step 2: Convert to fraction form
    493,884.80/740,827.20 = 138,910.40/x
  3. Step 3: Cross multiply
    493,884.80x = 740,827.20 × 138,910.40
  4. Step 4: Simplify right side
    493,884.80x = 102,908,602,682.88
  5. Step 5: Solve for x
    x = 102,908,602,682.88/493,884.80
  6. Step 6: Final answer
    x = 208,365.60

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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.