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Finding the Fourth Proportional to 1,281,821,956.80, 1,922,711,923.80 and 408,411,460.32

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Solution

The fourth proportional to 1,281,821,956.80, 1,922,711,923.80 and 408,411,460.32 is: 612,610,495.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,821,956.80 : 1,922,711,923.80 = 408,411,460.32 : x
  2. Step 2: Convert to fraction form
    1,281,821,956.80/1,922,711,923.80 = 408,411,460.32/x
  3. Step 3: Cross multiply
    1,281,821,956.80x = 1,922,711,923.80 × 408,411,460.32
  4. Step 4: Simplify right side
    1,281,821,956.80x = 785,257,584,573,834,496
  5. Step 5: Solve for x
    x = 785,257,584,573,834,496/1,281,821,956.80
  6. Step 6: Final answer
    x = 612,610,495.87

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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.