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Finding the Fourth Proportional to 258,355.10, 356,486.94 and 143,630.54

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Solution

The fourth proportional to 258,355.10, 356,486.94 and 143,630.54 is: 198,186.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,355.10 : 356,486.94 = 143,630.54 : x
  2. Step 2: Convert to fraction form
    258,355.10/356,486.94 = 143,630.54/x
  3. Step 3: Cross multiply
    258,355.10x = 356,486.94 × 143,630.54
  4. Step 4: Simplify right side
    258,355.10x = 51,202,411,695.15
  5. Step 5: Solve for x
    x = 51,202,411,695.15/258,355.10
  6. Step 6: Final answer
    x = 198,186.19

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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.