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Finding the Fourth Proportional to 401,303.89, 553,856.16 and 248,391.28

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Solution

The fourth proportional to 401,303.89, 553,856.16 and 248,391.28 is: 342,815.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,303.89 : 553,856.16 = 248,391.28 : x
  2. Step 2: Convert to fraction form
    401,303.89/553,856.16 = 248,391.28/x
  3. Step 3: Cross multiply
    401,303.89x = 553,856.16 × 248,391.28
  4. Step 4: Simplify right side
    401,303.89x = 137,573,040,518.29
  5. Step 5: Solve for x
    x = 137,573,040,518.29/401,303.89
  6. Step 6: Final answer
    x = 342,815.12

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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.