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Finding the Fourth Proportional to 258,231.48, 356,358.87 and 143,509.74

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Solution

The fourth proportional to 258,231.48, 356,358.87 and 143,509.74 is: 198,043.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,231.48 : 356,358.87 = 143,509.74 : x
  2. Step 2: Convert to fraction form
    258,231.48/356,358.87 = 143,509.74/x
  3. Step 3: Cross multiply
    258,231.48x = 356,358.87 × 143,509.74
  4. Step 4: Simplify right side
    258,231.48x = 51,140,968,780.39
  5. Step 5: Solve for x
    x = 51,140,968,780.39/258,231.48
  6. Step 6: Final answer
    x = 198,043.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.