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Finding the Fourth Proportional to 357,979.20, 537,163.20 and 147,638.40

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Solution

The fourth proportional to 357,979.20, 537,163.20 and 147,638.40 is: 221,537.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,979.20 : 537,163.20 = 147,638.40 : x
  2. Step 2: Convert to fraction form
    357,979.20/537,163.20 = 147,638.40/x
  3. Step 3: Cross multiply
    357,979.20x = 537,163.20 × 147,638.40
  4. Step 4: Simplify right side
    357,979.20x = 79,305,915,386.88
  5. Step 5: Solve for x
    x = 79,305,915,386.88/357,979.20
  6. Step 6: Final answer
    x = 221,537.77

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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.