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Finding the Fourth Proportional to 258,605.30, 388,017.30 and 163,908.20

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Solution

The fourth proportional to 258,605.30, 388,017.30 and 163,908.20 is: 245,931.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,605.30 : 388,017.30 = 163,908.20 : x
  2. Step 2: Convert to fraction form
    258,605.30/388,017.30 = 163,908.20/x
  3. Step 3: Cross multiply
    258,605.30x = 388,017.30 × 163,908.20
  4. Step 4: Simplify right side
    258,605.30x = 63,599,217,211.86
  5. Step 5: Solve for x
    x = 63,599,217,211.86/258,605.30
  6. Step 6: Final answer
    x = 245,931.61

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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.