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Finding the Fourth Proportional to 401,082.17, 553,440.74 and 239,878.40

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Solution

The fourth proportional to 401,082.17, 553,440.74 and 239,878.40 is: 331,000.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,082.17 : 553,440.74 = 239,878.40 : x
  2. Step 2: Convert to fraction form
    401,082.17/553,440.74 = 239,878.40/x
  3. Step 3: Cross multiply
    401,082.17x = 553,440.74 × 239,878.40
  4. Step 4: Simplify right side
    401,082.17x = 132,758,475,239.42
  5. Step 5: Solve for x
    x = 132,758,475,239.42/401,082.17
  6. Step 6: Final answer
    x = 331,000.69

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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.