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Finding the Fourth Proportional to 388,651.16, 581,659.99 and 238,986.25

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Solution

The fourth proportional to 388,651.16, 581,659.99 and 238,986.25 is: 357,669.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,651.16 : 581,659.99 = 238,986.25 : x
  2. Step 2: Convert to fraction form
    388,651.16/581,659.99 = 238,986.25/x
  3. Step 3: Cross multiply
    388,651.16x = 581,659.99 × 238,986.25
  4. Step 4: Simplify right side
    388,651.16x = 139,008,737,733.52
  5. Step 5: Solve for x
    x = 139,008,737,733.52/388,651.16
  6. Step 6: Final answer
    x = 357,669.68

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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.