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Finding the Fourth Proportional to 479,139, 717,998.49 and 194,483.18

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Solution

The fourth proportional to 479,139, 717,998.49 and 194,483.18 is: 291,436.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,139 : 717,998.49 = 194,483.18 : x
  2. Step 2: Convert to fraction form
    479,139/717,998.49 = 194,483.18/x
  3. Step 3: Cross multiply
    479,139x = 717,998.49 × 194,483.18
  4. Step 4: Simplify right side
    479,139x = 139,638,630,056.61
  5. Step 5: Solve for x
    x = 139,638,630,056.61/479,139
  6. Step 6: Final answer
    x = 291,436.58

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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.