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Finding the Fourth Proportional to 1,328,612,759.60, 1,993,486,009.80 and 638,164,612.40

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Solution

The fourth proportional to 1,328,612,759.60, 1,993,486,009.80 and 638,164,612.40 is: 957,519,200.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,612,759.60 : 1,993,486,009.80 = 638,164,612.40 : x
  2. Step 2: Convert to fraction form
    1,328,612,759.60/1,993,486,009.80 = 638,164,612.40/x
  3. Step 3: Cross multiply
    1,328,612,759.60x = 1,993,486,009.80 × 638,164,612.40
  4. Step 4: Simplify right side
    1,328,612,759.60x = 1,272,172,226,768,839,424
  5. Step 5: Solve for x
    x = 1,272,172,226,768,839,424/1,328,612,759.60
  6. Step 6: Final answer
    x = 957,519,200.07

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1.5x scale

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.