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Finding the Fourth Proportional to 208,035.80, 312,053.70 and 199,287.80

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Solution

The fourth proportional to 208,035.80, 312,053.70 and 199,287.80 is: 298,931.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,035.80 : 312,053.70 = 199,287.80 : x
  2. Step 2: Convert to fraction form
    208,035.80/312,053.70 = 199,287.80/x
  3. Step 3: Cross multiply
    208,035.80x = 312,053.70 × 199,287.80
  4. Step 4: Simplify right side
    208,035.80x = 62,188,495,354.86
  5. Step 5: Solve for x
    x = 62,188,495,354.86/208,035.80
  6. Step 6: Final answer
    x = 298,931.70

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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.