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Finding the Fourth Proportional to 657,680.80, 986,521.20 and 325,904.80

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Solution

The fourth proportional to 657,680.80, 986,521.20 and 325,904.80 is: 488,857.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,680.80 : 986,521.20 = 325,904.80 : x
  2. Step 2: Convert to fraction form
    657,680.80/986,521.20 = 325,904.80/x
  3. Step 3: Cross multiply
    657,680.80x = 986,521.20 × 325,904.80
  4. Step 4: Simplify right side
    657,680.80x = 321,511,994,381.76
  5. Step 5: Solve for x
    x = 321,511,994,381.76/657,680.80
  6. Step 6: Final answer
    x = 488,857.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.