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Finding the Fourth Proportional to 585,630.80, 878,489.40 and 211,605.20

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Solution

The fourth proportional to 585,630.80, 878,489.40 and 211,605.20 is: 317,423.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,630.80 : 878,489.40 = 211,605.20 : x
  2. Step 2: Convert to fraction form
    585,630.80/878,489.40 = 211,605.20/x
  3. Step 3: Cross multiply
    585,630.80x = 878,489.40 × 211,605.20
  4. Step 4: Simplify right side
    585,630.80x = 185,892,925,184.88
  5. Step 5: Solve for x
    x = 185,892,925,184.88/585,630.80
  6. Step 6: Final answer
    x = 317,423.41

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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.