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Finding the Fourth Proportional to 401,930.79, 554,644.12 and 238,594.28

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Solution

The fourth proportional to 401,930.79, 554,644.12 and 238,594.28 is: 329,248.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,930.79 : 554,644.12 = 238,594.28 : x
  2. Step 2: Convert to fraction form
    401,930.79/554,644.12 = 238,594.28/x
  3. Step 3: Cross multiply
    401,930.79x = 554,644.12 × 238,594.28
  4. Step 4: Simplify right side
    401,930.79x = 132,334,913,050.76
  5. Step 5: Solve for x
    x = 132,334,913,050.76/401,930.79
  6. Step 6: Final answer
    x = 329,248.01

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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.