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Finding the Fourth Proportional to 401,088.30, 553,509.21 and 219,789.64

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Solution

The fourth proportional to 401,088.30, 553,509.21 and 219,789.64 is: 303,313.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,088.30 : 553,509.21 = 219,789.64 : x
  2. Step 2: Convert to fraction form
    401,088.30/553,509.21 = 219,789.64/x
  3. Step 3: Cross multiply
    401,088.30x = 553,509.21 × 219,789.64
  4. Step 4: Simplify right side
    401,088.30x = 121,655,590,002.58
  5. Step 5: Solve for x
    x = 121,655,590,002.58/401,088.30
  6. Step 6: Final answer
    x = 303,313.73

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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.