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Finding the Fourth Proportional to 489,415.18, 734,035.28 and 311,393.38

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Solution

The fourth proportional to 489,415.18, 734,035.28 and 311,393.38 is: 467,034.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,415.18 : 734,035.28 = 311,393.38 : x
  2. Step 2: Convert to fraction form
    489,415.18/734,035.28 = 311,393.38/x
  3. Step 3: Cross multiply
    489,415.18x = 734,035.28 × 311,393.38
  4. Step 4: Simplify right side
    489,415.18x = 228,573,726,878.45
  5. Step 5: Solve for x
    x = 228,573,726,878.45/489,415.18
  6. Step 6: Final answer
    x = 467,034.40

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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.