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Finding the Fourth Proportional to 810,203.20, 1,215,304.80 and 573,812.80

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Solution

The fourth proportional to 810,203.20, 1,215,304.80 and 573,812.80 is: 860,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,203.20 : 1,215,304.80 = 573,812.80 : x
  2. Step 2: Convert to fraction form
    810,203.20/1,215,304.80 = 573,812.80/x
  3. Step 3: Cross multiply
    810,203.20x = 1,215,304.80 × 573,812.80
  4. Step 4: Simplify right side
    810,203.20x = 697,357,450,141.44
  5. Step 5: Solve for x
    x = 697,357,450,141.44/810,203.20
  6. Step 6: Final answer
    x = 860,719.20

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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.