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Finding the Fourth Proportional to 401,057.63, 553,459.53 and 239,919.47

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Solution

The fourth proportional to 401,057.63, 553,459.53 and 239,919.47 is: 331,088.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,057.63 : 553,459.53 = 239,919.47 : x
  2. Step 2: Convert to fraction form
    401,057.63/553,459.53 = 239,919.47/x
  3. Step 3: Cross multiply
    401,057.63x = 553,459.53 × 239,919.47
  4. Step 4: Simplify right side
    401,057.63x = 132,785,714,336.75
  5. Step 5: Solve for x
    x = 132,785,714,336.75/401,057.63
  6. Step 6: Final answer
    x = 331,088.87

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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.