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Finding the Fourth Proportional to 389,012.77, 583,519.12 and 122,960.10

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Solution

The fourth proportional to 389,012.77, 583,519.12 and 122,960.10 is: 184,440.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,012.77 : 583,519.12 = 122,960.10 : x
  2. Step 2: Convert to fraction form
    389,012.77/583,519.12 = 122,960.10/x
  3. Step 3: Cross multiply
    389,012.77x = 583,519.12 × 122,960.10
  4. Step 4: Simplify right side
    389,012.77x = 71,749,569,347.11
  5. Step 5: Solve for x
    x = 71,749,569,347.11/389,012.77
  6. Step 6: Final answer
    x = 184,440.14

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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.