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Finding the Fourth Proportional to 303,421.80, 455,132.70 and 208,943.40

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Solution

The fourth proportional to 303,421.80, 455,132.70 and 208,943.40 is: 313,415.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,421.80 : 455,132.70 = 208,943.40 : x
  2. Step 2: Convert to fraction form
    303,421.80/455,132.70 = 208,943.40/x
  3. Step 3: Cross multiply
    303,421.80x = 455,132.70 × 208,943.40
  4. Step 4: Simplify right side
    303,421.80x = 95,096,973,789.18
  5. Step 5: Solve for x
    x = 95,096,973,789.18/303,421.80
  6. Step 6: Final answer
    x = 313,415.10

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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.