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Finding the Fourth Proportional to 258,077.80, 387,116.70 and 210,838.60

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Solution

The fourth proportional to 258,077.80, 387,116.70 and 210,838.60 is: 316,257.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,077.80 : 387,116.70 = 210,838.60 : x
  2. Step 2: Convert to fraction form
    258,077.80/387,116.70 = 210,838.60/x
  3. Step 3: Cross multiply
    258,077.80x = 387,116.70 × 210,838.60
  4. Step 4: Simplify right side
    258,077.80x = 81,619,143,064.62
  5. Step 5: Solve for x
    x = 81,619,143,064.62/258,077.80
  6. Step 6: Final answer
    x = 316,257.90

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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.