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Finding the Fourth Proportional to 258,746.40, 388,119.60 and 132,337.80

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Solution

The fourth proportional to 258,746.40, 388,119.60 and 132,337.80 is: 198,506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,746.40 : 388,119.60 = 132,337.80 : x
  2. Step 2: Convert to fraction form
    258,746.40/388,119.60 = 132,337.80/x
  3. Step 3: Cross multiply
    258,746.40x = 388,119.60 × 132,337.80
  4. Step 4: Simplify right side
    258,746.40x = 51,362,894,000.88
  5. Step 5: Solve for x
    x = 51,362,894,000.88/258,746.40
  6. Step 6: Final answer
    x = 198,506.70

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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.