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Finding the Fourth Proportional to 325,302.80, 487,808.40 and 147,718.40

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Solution

The fourth proportional to 325,302.80, 487,808.40 and 147,718.40 is: 221,511.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,302.80 : 487,808.40 = 147,718.40 : x
  2. Step 2: Convert to fraction form
    325,302.80/487,808.40 = 147,718.40/x
  3. Step 3: Cross multiply
    325,302.80x = 487,808.40 × 147,718.40
  4. Step 4: Simplify right side
    325,302.80x = 72,058,276,354.56
  5. Step 5: Solve for x
    x = 72,058,276,354.56/325,302.80
  6. Step 6: Final answer
    x = 221,511.39

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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.