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Finding the Fourth Proportional to 400,911.90, 553,048.69 and 247,901.19

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Solution

The fourth proportional to 400,911.90, 553,048.69 and 247,901.19 is: 341,973.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,911.90 : 553,048.69 = 247,901.19 : x
  2. Step 2: Convert to fraction form
    400,911.90/553,048.69 = 247,901.19/x
  3. Step 3: Cross multiply
    400,911.90x = 553,048.69 × 247,901.19
  4. Step 4: Simplify right side
    400,911.90x = 137,101,428,378.94
  5. Step 5: Solve for x
    x = 137,101,428,378.94/400,911.90
  6. Step 6: Final answer
    x = 341,973.96

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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.