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Finding the Fourth Proportional to 258,986.80, 388,577.40 and 101,328.40

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Solution

The fourth proportional to 258,986.80, 388,577.40 and 101,328.40 is: 152,030.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,986.80 : 388,577.40 = 101,328.40 : x
  2. Step 2: Convert to fraction form
    258,986.80/388,577.40 = 101,328.40/x
  3. Step 3: Cross multiply
    258,986.80x = 388,577.40 × 101,328.40
  4. Step 4: Simplify right side
    258,986.80x = 39,373,926,218.16
  5. Step 5: Solve for x
    x = 39,373,926,218.16/258,986.80
  6. Step 6: Final answer
    x = 152,030.63

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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.