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Finding the Fourth Proportional to 618,932.94, 854,129.63 and 389,641.93

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Solution

The fourth proportional to 618,932.94, 854,129.63 and 389,641.93 is: 537,707.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,932.94 : 854,129.63 = 389,641.93 : x
  2. Step 2: Convert to fraction form
    618,932.94/854,129.63 = 389,641.93/x
  3. Step 3: Cross multiply
    618,932.94x = 854,129.63 × 389,641.93
  4. Step 4: Simplify right side
    618,932.94x = 332,804,717,503.39
  5. Step 5: Solve for x
    x = 332,804,717,503.39/618,932.94
  6. Step 6: Final answer
    x = 537,707.23

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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.