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Finding the Fourth Proportional to 489,970.96, 676,159.40 and 275,111.87

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Solution

The fourth proportional to 489,970.96, 676,159.40 and 275,111.87 is: 379,654.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,970.96 : 676,159.40 = 275,111.87 : x
  2. Step 2: Convert to fraction form
    489,970.96/676,159.40 = 275,111.87/x
  3. Step 3: Cross multiply
    489,970.96x = 676,159.40 × 275,111.87
  4. Step 4: Simplify right side
    489,970.96x = 186,019,474,259.06
  5. Step 5: Solve for x
    x = 186,019,474,259.06/489,970.96
  6. Step 6: Final answer
    x = 379,654.08

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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.