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Finding the Fourth Proportional to 401,215.64, 553,657.02 and 231,439.64

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Solution

The fourth proportional to 401,215.64, 553,657.02 and 231,439.64 is: 319,374.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,215.64 : 553,657.02 = 231,439.64 : x
  2. Step 2: Convert to fraction form
    401,215.64/553,657.02 = 231,439.64/x
  3. Step 3: Cross multiply
    401,215.64x = 553,657.02 × 231,439.64
  4. Step 4: Simplify right side
    401,215.64x = 128,138,181,392.27
  5. Step 5: Solve for x
    x = 128,138,181,392.27/401,215.64
  6. Step 6: Final answer
    x = 319,374.84

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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.