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Finding the Fourth Proportional to 671,529,357.16, 926,714,189 and 389,439,049.76

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Solution

The fourth proportional to 671,529,357.16, 926,714,189 and 389,439,049.76 is: 537,428,020.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,529,357.16 : 926,714,189 = 389,439,049.76 : x
  2. Step 2: Convert to fraction form
    671,529,357.16/926,714,189 = 389,439,049.76/x
  3. Step 3: Cross multiply
    671,529,357.16x = 926,714,189 × 389,439,049.76
  4. Step 4: Simplify right side
    671,529,357.16x = 360,898,693,163,269,056
  5. Step 5: Solve for x
    x = 360,898,693,163,269,056/671,529,357.16
  6. Step 6: Final answer
    x = 537,428,020.56

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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.