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Finding the Fourth Proportional to 340,435.78, 469,826.35 and 243,648.72

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Solution

The fourth proportional to 340,435.78, 469,826.35 and 243,648.72 is: 336,253.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,435.78 : 469,826.35 = 243,648.72 : x
  2. Step 2: Convert to fraction form
    340,435.78/469,826.35 = 243,648.72/x
  3. Step 3: Cross multiply
    340,435.78x = 469,826.35 × 243,648.72
  4. Step 4: Simplify right side
    340,435.78x = 114,472,588,190.65
  5. Step 5: Solve for x
    x = 114,472,588,190.65/340,435.78
  6. Step 6: Final answer
    x = 336,253.11

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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.