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Finding the Fourth Proportional to 479,274, 718,848.54 and 142,307.88

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Solution

The fourth proportional to 479,274, 718,848.54 and 142,307.88 is: 213,443.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,274 : 718,848.54 = 142,307.88 : x
  2. Step 2: Convert to fraction form
    479,274/718,848.54 = 142,307.88/x
  3. Step 3: Cross multiply
    479,274x = 718,848.54 × 142,307.88
  4. Step 4: Simplify right side
    479,274x = 102,297,811,768.50
  5. Step 5: Solve for x
    x = 102,297,811,768.50/479,274
  6. Step 6: Final answer
    x = 213,443.27

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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.