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Finding the Fourth Proportional to 258,312.38, 387,100.54 and 190,309.58

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Solution

The fourth proportional to 258,312.38, 387,100.54 and 190,309.58 is: 285,193.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,312.38 : 387,100.54 = 190,309.58 : x
  2. Step 2: Convert to fraction form
    258,312.38/387,100.54 = 190,309.58/x
  3. Step 3: Cross multiply
    258,312.38x = 387,100.54 × 190,309.58
  4. Step 4: Simplify right side
    258,312.38x = 73,668,941,677.15
  5. Step 5: Solve for x
    x = 73,668,941,677.15/258,312.38
  6. Step 6: Final answer
    x = 285,193.23

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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.