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Finding the Fourth Proportional to 401,120.76, 553,798.26 and 258,129.24

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Solution

The fourth proportional to 401,120.76, 553,798.26 and 258,129.24 is: 356,380.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,120.76 : 553,798.26 = 258,129.24 : x
  2. Step 2: Convert to fraction form
    401,120.76/553,798.26 = 258,129.24/x
  3. Step 3: Cross multiply
    401,120.76x = 553,798.26 × 258,129.24
  4. Step 4: Simplify right side
    401,120.76x = 142,951,523,967.12
  5. Step 5: Solve for x
    x = 142,951,523,967.12/401,120.76
  6. Step 6: Final answer
    x = 356,380.27

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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.