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Finding the Fourth Proportional to 257,828.80, 386,840.40 and 124,826.80

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Solution

The fourth proportional to 257,828.80, 386,840.40 and 124,826.80 is: 187,287.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,828.80 : 386,840.40 = 124,826.80 : x
  2. Step 2: Convert to fraction form
    257,828.80/386,840.40 = 124,826.80/x
  3. Step 3: Cross multiply
    257,828.80x = 386,840.40 × 124,826.80
  4. Step 4: Simplify right side
    257,828.80x = 48,288,049,242.72
  5. Step 5: Solve for x
    x = 48,288,049,242.72/257,828.80
  6. Step 6: Final answer
    x = 187,287.26

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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.