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Finding the Fourth Proportional to 258,700.38, 388,300.83 and 186,727.49

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Solution

The fourth proportional to 258,700.38, 388,300.83 and 186,727.49 is: 280,271.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,700.38 : 388,300.83 = 186,727.49 : x
  2. Step 2: Convert to fraction form
    258,700.38/388,300.83 = 186,727.49/x
  3. Step 3: Cross multiply
    258,700.38x = 388,300.83 × 186,727.49
  4. Step 4: Simplify right side
    258,700.38x = 72,506,438,165.21
  5. Step 5: Solve for x
    x = 72,506,438,165.21/258,700.38
  6. Step 6: Final answer
    x = 280,271.87

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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.