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Finding the Fourth Proportional to 489,868.85, 676,018.53 and 275,009.31

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Solution

The fourth proportional to 489,868.85, 676,018.53 and 275,009.31 is: 379,512.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,868.85 : 676,018.53 = 275,009.31 : x
  2. Step 2: Convert to fraction form
    489,868.85/676,018.53 = 275,009.31/x
  3. Step 3: Cross multiply
    489,868.85x = 676,018.53 × 275,009.31
  4. Step 4: Simplify right side
    489,868.85x = 185,911,389,482.51
  5. Step 5: Solve for x
    x = 185,911,389,482.51/489,868.85
  6. Step 6: Final answer
    x = 379,512.57

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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.