Home / 258,608.08-356,876.80-145,428.40

Finding the Fourth Proportional to 258,608.08, 356,876.80 and 145,428.40

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Solution

The fourth proportional to 258,608.08, 356,876.80 and 145,428.40 is: 200,689.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,608.08 : 356,876.80 = 145,428.40 : x
  2. Step 2: Convert to fraction form
    258,608.08/356,876.80 = 145,428.40/x
  3. Step 3: Cross multiply
    258,608.08x = 356,876.80 × 145,428.40
  4. Step 4: Simplify right side
    258,608.08x = 51,900,022,021.12
  5. Step 5: Solve for x
    x = 51,900,022,021.12/258,608.08
  6. Step 6: Final answer
    x = 200,689.87

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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.