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Finding the Fourth Proportional to 401,302.89, 553,854.78 and 248,390.28

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Solution

The fourth proportional to 401,302.89, 553,854.78 and 248,390.28 is: 342,813.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,302.89 : 553,854.78 = 248,390.28 : x
  2. Step 2: Convert to fraction form
    401,302.89/553,854.78 = 248,390.28/x
  3. Step 3: Cross multiply
    401,302.89x = 553,854.78 × 248,390.28
  4. Step 4: Simplify right side
    401,302.89x = 137,572,143,883.54
  5. Step 5: Solve for x
    x = 137,572,143,883.54/401,302.89
  6. Step 6: Final answer
    x = 342,813.74

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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.