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Finding the Fourth Proportional to 258,865.20, 388,239.27 and 101,012.40

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Solution

The fourth proportional to 258,865.20, 388,239.27 and 101,012.40 is: 151,495.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,865.20 : 388,239.27 = 101,012.40 : x
  2. Step 2: Convert to fraction form
    258,865.20/388,239.27 = 101,012.40/x
  3. Step 3: Cross multiply
    258,865.20x = 388,239.27 × 101,012.40
  4. Step 4: Simplify right side
    258,865.20x = 39,216,980,436.95
  5. Step 5: Solve for x
    x = 39,216,980,436.95/258,865.20
  6. Step 6: Final answer
    x = 151,495.76

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1.5x scale

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.