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Finding the Fourth Proportional to 1,370,248,392, 1,890,944,858.88 and 743,717,049.12

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Solution

The fourth proportional to 1,370,248,392, 1,890,944,858.88 and 743,717,049.12 is: 1,026,330,655.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370,248,392 : 1,890,944,858.88 = 743,717,049.12 : x
  2. Step 2: Convert to fraction form
    1,370,248,392/1,890,944,858.88 = 743,717,049.12/x
  3. Step 3: Cross multiply
    1,370,248,392x = 1,890,944,858.88 × 743,717,049.12
  4. Step 4: Simplify right side
    1,370,248,392x = 1,406,327,930,494,868,480
  5. Step 5: Solve for x
    x = 1,406,327,930,494,868,480/1,370,248,392
  6. Step 6: Final answer
    x = 1,026,330,655.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.