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Finding the Fourth Proportional to 812,592,941.80, 1,218,889,412.70 and 605,664,250.60

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Solution

The fourth proportional to 812,592,941.80, 1,218,889,412.70 and 605,664,250.60 is: 908,496,375.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,592,941.80 : 1,218,889,412.70 = 605,664,250.60 : x
  2. Step 2: Convert to fraction form
    812,592,941.80/1,218,889,412.70 = 605,664,250.60/x
  3. Step 3: Cross multiply
    812,592,941.80x = 1,218,889,412.70 × 605,664,250.60
  4. Step 4: Simplify right side
    812,592,941.80x = 738,237,742,707,219,712
  5. Step 5: Solve for x
    x = 738,237,742,707,219,712/812,592,941.80
  6. Step 6: Final answer
    x = 908,496,375.90

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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.