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Finding the Fourth Proportional to 258,019.80, 387,029.70 and 204,875.70

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Solution

The fourth proportional to 258,019.80, 387,029.70 and 204,875.70 is: 307,313.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,019.80 : 387,029.70 = 204,875.70 : x
  2. Step 2: Convert to fraction form
    258,019.80/387,029.70 = 204,875.70/x
  3. Step 3: Cross multiply
    258,019.80x = 387,029.70 × 204,875.70
  4. Step 4: Simplify right side
    258,019.80x = 79,292,980,708.29
  5. Step 5: Solve for x
    x = 79,292,980,708.29/258,019.80
  6. Step 6: Final answer
    x = 307,313.55

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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.