Home / 687,289,174.72-948,490,293.14-405,043,527.46

Finding the Fourth Proportional to 687,289,174.72, 948,490,293.14 and 405,043,527.46

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Solution

The fourth proportional to 687,289,174.72, 948,490,293.14 and 405,043,527.46 is: 558,978,474.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,289,174.72 : 948,490,293.14 = 405,043,527.46 : x
  2. Step 2: Convert to fraction form
    687,289,174.72/948,490,293.14 = 405,043,527.46/x
  3. Step 3: Cross multiply
    687,289,174.72x = 948,490,293.14 × 405,043,527.46
  4. Step 4: Simplify right side
    687,289,174.72x = 384,179,854,094,995,008
  5. Step 5: Solve for x
    x = 384,179,854,094,995,008/687,289,174.72
  6. Step 6: Final answer
    x = 558,978,474.02

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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.