Home / 1,278,312,702.56-1,918,021,447.98-687,412,293.54

Finding the Fourth Proportional to 1,278,312,702.56, 1,918,021,447.98 and 687,412,293.54

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Solution

The fourth proportional to 1,278,312,702.56, 1,918,021,447.98 and 687,412,293.54 is: 1,031,415,490.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,312,702.56 : 1,918,021,447.98 = 687,412,293.54 : x
  2. Step 2: Convert to fraction form
    1,278,312,702.56/1,918,021,447.98 = 687,412,293.54/x
  3. Step 3: Cross multiply
    1,278,312,702.56x = 1,918,021,447.98 × 687,412,293.54
  4. Step 4: Simplify right side
    1,278,312,702.56x = 1,318,471,522,614,843,648
  5. Step 5: Solve for x
    x = 1,318,471,522,614,843,648/1,278,312,702.56
  6. Step 6: Final answer
    x = 1,031,415,490.10

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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.