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Finding the Fourth Proportional to 612,071.80, 917,211.30 and 548,891.80

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Solution

The fourth proportional to 612,071.80, 917,211.30 and 548,891.80 is: 822,533.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,071.80 : 917,211.30 = 548,891.80 : x
  2. Step 2: Convert to fraction form
    612,071.80/917,211.30 = 548,891.80/x
  3. Step 3: Cross multiply
    612,071.80x = 917,211.30 × 548,891.80
  4. Step 4: Simplify right side
    612,071.80x = 503,449,761,437.34
  5. Step 5: Solve for x
    x = 503,449,761,437.34/612,071.80
  6. Step 6: Final answer
    x = 822,533.83

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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.