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Finding the Fourth Proportional to 400,970.99, 553,339.96 and 219,689.82

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Solution

The fourth proportional to 400,970.99, 553,339.96 and 219,689.82 is: 303,171.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,970.99 : 553,339.96 = 219,689.82 : x
  2. Step 2: Convert to fraction form
    400,970.99/553,339.96 = 219,689.82/x
  3. Step 3: Cross multiply
    400,970.99x = 553,339.96 × 219,689.82
  4. Step 4: Simplify right side
    400,970.99x = 121,563,155,661.98
  5. Step 5: Solve for x
    x = 121,563,155,661.98/400,970.99
  6. Step 6: Final answer
    x = 303,171.94

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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.