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Finding the Fourth Proportional to 610,843.80, 918,015.30 and 533,861.40

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Solution

The fourth proportional to 610,843.80, 918,015.30 and 533,861.40 is: 802,321.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,843.80 : 918,015.30 = 533,861.40 : x
  2. Step 2: Convert to fraction form
    610,843.80/918,015.30 = 533,861.40/x
  3. Step 3: Cross multiply
    610,843.80x = 918,015.30 × 533,861.40
  4. Step 4: Simplify right side
    610,843.80x = 490,092,933,279.42
  5. Step 5: Solve for x
    x = 490,092,933,279.42/610,843.80
  6. Step 6: Final answer
    x = 802,321.20

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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.