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Finding the Fourth Proportional to 620,643.92, 930,964.48 and 165,235.28

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Solution

The fourth proportional to 620,643.92, 930,964.48 and 165,235.28 is: 247,852.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,643.92 : 930,964.48 = 165,235.28 : x
  2. Step 2: Convert to fraction form
    620,643.92/930,964.48 = 165,235.28/x
  3. Step 3: Cross multiply
    620,643.92x = 930,964.48 × 165,235.28
  4. Step 4: Simplify right side
    620,643.92x = 153,828,171,454.94
  5. Step 5: Solve for x
    x = 153,828,171,454.94/620,643.92
  6. Step 6: Final answer
    x = 247,852.54

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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.