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Finding the Fourth Proportional to 489,980.10, 676,331.06 and 317,593.88

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Solution

The fourth proportional to 489,980.10, 676,331.06 and 317,593.88 is: 438,382.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,980.10 : 676,331.06 = 317,593.88 : x
  2. Step 2: Convert to fraction form
    489,980.10/676,331.06 = 317,593.88/x
  3. Step 3: Cross multiply
    489,980.10x = 676,331.06 × 317,593.88
  4. Step 4: Simplify right side
    489,980.10x = 214,798,605,509.91
  5. Step 5: Solve for x
    x = 214,798,605,509.91/489,980.10
  6. Step 6: Final answer
    x = 438,382.30

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1.5x scale

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.