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Finding the Fourth Proportional to 389,158.70, 583,689.75 and 104,871.48

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Solution

The fourth proportional to 389,158.70, 583,689.75 and 104,871.48 is: 157,294.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,158.70 : 583,689.75 = 104,871.48 : x
  2. Step 2: Convert to fraction form
    389,158.70/583,689.75 = 104,871.48/x
  3. Step 3: Cross multiply
    389,158.70x = 583,689.75 × 104,871.48
  4. Step 4: Simplify right side
    389,158.70x = 61,212,405,361.23
  5. Step 5: Solve for x
    x = 61,212,405,361.23/389,158.70
  6. Step 6: Final answer
    x = 157,294.20

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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.