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Finding the Fourth Proportional to 711,000.80, 1,066,654.80 and 212,415.20

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Solution

The fourth proportional to 711,000.80, 1,066,654.80 and 212,415.20 is: 318,668.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,000.80 : 1,066,654.80 = 212,415.20 : x
  2. Step 2: Convert to fraction form
    711,000.80/1,066,654.80 = 212,415.20/x
  3. Step 3: Cross multiply
    711,000.80x = 1,066,654.80 × 212,415.20
  4. Step 4: Simplify right side
    711,000.80x = 226,573,692,672.96
  5. Step 5: Solve for x
    x = 226,573,692,672.96/711,000.80
  6. Step 6: Final answer
    x = 318,668.69

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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.