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Finding the Fourth Proportional to 291,053,393.60, 436,580,090.40 and 145,509,418.40

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Solution

The fourth proportional to 291,053,393.60, 436,580,090.40 and 145,509,418.40 is: 218,264,127.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,053,393.60 : 436,580,090.40 = 145,509,418.40 : x
  2. Step 2: Convert to fraction form
    291,053,393.60/436,580,090.40 = 145,509,418.40/x
  3. Step 3: Cross multiply
    291,053,393.60x = 436,580,090.40 × 145,509,418.40
  4. Step 4: Simplify right side
    291,053,393.60x = 63,526,515,039,123,424
  5. Step 5: Solve for x
    x = 63,526,515,039,123,424/291,053,393.60
  6. Step 6: Final answer
    x = 218,264,127.60

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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.