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Finding the Fourth Proportional to 401,196.64, 553,630.80 and 231,420.64

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Solution

The fourth proportional to 401,196.64, 553,630.80 and 231,420.64 is: 319,348.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,196.64 : 553,630.80 = 231,420.64 : x
  2. Step 2: Convert to fraction form
    401,196.64/553,630.80 = 231,420.64/x
  3. Step 3: Cross multiply
    401,196.64x = 553,630.80 × 231,420.64
  4. Step 4: Simplify right side
    401,196.64x = 128,121,594,059.71
  5. Step 5: Solve for x
    x = 128,121,594,059.71/401,196.64
  6. Step 6: Final answer
    x = 319,348.62

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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.