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Finding the Fourth Proportional to 228,739.80, 343,109.70 and 215,909.40

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Solution

The fourth proportional to 228,739.80, 343,109.70 and 215,909.40 is: 323,864.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,739.80 : 343,109.70 = 215,909.40 : x
  2. Step 2: Convert to fraction form
    228,739.80/343,109.70 = 215,909.40/x
  3. Step 3: Cross multiply
    228,739.80x = 343,109.70 × 215,909.40
  4. Step 4: Simplify right side
    228,739.80x = 74,080,609,461.18
  5. Step 5: Solve for x
    x = 74,080,609,461.18/228,739.80
  6. Step 6: Final answer
    x = 323,864.10

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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.