Home / 489,977.10-676,326.92-317,590.88

Finding the Fourth Proportional to 489,977.10, 676,326.92 and 317,590.88

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Solution

The fourth proportional to 489,977.10, 676,326.92 and 317,590.88 is: 438,378.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,977.10 : 676,326.92 = 317,590.88 : x
  2. Step 2: Convert to fraction form
    489,977.10/676,326.92 = 317,590.88/x
  3. Step 3: Cross multiply
    489,977.10x = 676,326.92 × 317,590.88
  4. Step 4: Simplify right side
    489,977.10x = 214,795,256,720.90
  5. Step 5: Solve for x
    x = 214,795,256,720.90/489,977.10
  6. Step 6: Final answer
    x = 438,378.15

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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.