Home / 921,211.80-1,381,817.70-838,543.20

Finding the Fourth Proportional to 921,211.80, 1,381,817.70 and 838,543.20

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Solution

The fourth proportional to 921,211.80, 1,381,817.70 and 838,543.20 is: 1,257,814.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,211.80 : 1,381,817.70 = 838,543.20 : x
  2. Step 2: Convert to fraction form
    921,211.80/1,381,817.70 = 838,543.20/x
  3. Step 3: Cross multiply
    921,211.80x = 1,381,817.70 × 838,543.20
  4. Step 4: Simplify right side
    921,211.80x = 1,158,713,835,974.64
  5. Step 5: Solve for x
    x = 1,158,713,835,974.64/921,211.80
  6. Step 6: Final answer
    x = 1,257,814.80

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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.