Home / 749,087,999.70-1,123,631,999.55-612,927,129.30

Finding the Fourth Proportional to 749,087,999.70, 1,123,631,999.55 and 612,927,129.30

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Solution

The fourth proportional to 749,087,999.70, 1,123,631,999.55 and 612,927,129.30 is: 919,390,693.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    749,087,999.70 : 1,123,631,999.55 = 612,927,129.30 : x
  2. Step 2: Convert to fraction form
    749,087,999.70/1,123,631,999.55 = 612,927,129.30/x
  3. Step 3: Cross multiply
    749,087,999.70x = 1,123,631,999.55 × 612,927,129.30
  4. Step 4: Simplify right side
    749,087,999.70x = 688,704,535,873,800,320
  5. Step 5: Solve for x
    x = 688,704,535,873,800,320/749,087,999.70
  6. Step 6: Final answer
    x = 919,390,693.95

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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.