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Finding the Fourth Proportional to 403,258.71, 556,431.90 and 231,145.00

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Solution

The fourth proportional to 403,258.71, 556,431.90 and 231,145.00 is: 318,942.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,258.71 : 556,431.90 = 231,145.00 : x
  2. Step 2: Convert to fraction form
    403,258.71/556,431.90 = 231,145.00/x
  3. Step 3: Cross multiply
    403,258.71x = 556,431.90 × 231,145.00
  4. Step 4: Simplify right side
    403,258.71x = 128,616,450,146.44
  5. Step 5: Solve for x
    x = 128,616,450,146.44/403,258.71
  6. Step 6: Final answer
    x = 318,942.77

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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.