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Finding the Fourth Proportional to 489,970.32, 676,218.87 and 308,679.21

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Solution

The fourth proportional to 489,970.32, 676,218.87 and 308,679.21 is: 426,015.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,970.32 : 676,218.87 = 308,679.21 : x
  2. Step 2: Convert to fraction form
    489,970.32/676,218.87 = 308,679.21/x
  3. Step 3: Cross multiply
    489,970.32x = 676,218.87 × 308,679.21
  4. Step 4: Simplify right side
    489,970.32x = 208,734,706,578.69
  5. Step 5: Solve for x
    x = 208,734,706,578.69/489,970.32
  6. Step 6: Final answer
    x = 426,015.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.