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Finding the Fourth Proportional to 489,979.02, 676,153.56 and 275,128.14

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Solution

The fourth proportional to 489,979.02, 676,153.56 and 275,128.14 is: 379,667.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,979.02 : 676,153.56 = 275,128.14 : x
  2. Step 2: Convert to fraction form
    489,979.02/676,153.56 = 275,128.14/x
  3. Step 3: Cross multiply
    489,979.02x = 676,153.56 × 275,128.14
  4. Step 4: Simplify right side
    489,979.02x = 186,028,871,317.18
  5. Step 5: Solve for x
    x = 186,028,871,317.18/489,979.02
  6. Step 6: Final answer
    x = 379,667.01

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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.