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Finding the Fourth Proportional to 573,932.80, 860,899.20 and 321,990.40

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Solution

The fourth proportional to 573,932.80, 860,899.20 and 321,990.40 is: 482,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,932.80 : 860,899.20 = 321,990.40 : x
  2. Step 2: Convert to fraction form
    573,932.80/860,899.20 = 321,990.40/x
  3. Step 3: Cross multiply
    573,932.80x = 860,899.20 × 321,990.40
  4. Step 4: Simplify right side
    573,932.80x = 277,201,277,767.68
  5. Step 5: Solve for x
    x = 277,201,277,767.68/573,932.80
  6. Step 6: Final answer
    x = 482,985.60

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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.