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Finding the Fourth Proportional to 262,653,419.80, 393,413,259.30 and 217,303,787.80

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Solution

The fourth proportional to 262,653,419.80, 393,413,259.30 and 217,303,787.80 is: 325,486,686.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,653,419.80 : 393,413,259.30 = 217,303,787.80 : x
  2. Step 2: Convert to fraction form
    262,653,419.80/393,413,259.30 = 217,303,787.80/x
  3. Step 3: Cross multiply
    262,653,419.80x = 393,413,259.30 × 217,303,787.80
  4. Step 4: Simplify right side
    262,653,419.80x = 85,490,191,416,633,584
  5. Step 5: Solve for x
    x = 85,490,191,416,633,584/262,653,419.80
  6. Step 6: Final answer
    x = 325,486,686.91

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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.