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Finding the Fourth Proportional to 400,810.65, 553,096.64 and 219,487.39

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Solution

The fourth proportional to 400,810.65, 553,096.64 and 219,487.39 is: 302,880.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,810.65 : 553,096.64 = 219,487.39 : x
  2. Step 2: Convert to fraction form
    400,810.65/553,096.64 = 219,487.39/x
  3. Step 3: Cross multiply
    400,810.65x = 553,096.64 × 219,487.39
  4. Step 4: Simplify right side
    400,810.65x = 121,397,735,999.91
  5. Step 5: Solve for x
    x = 121,397,735,999.91/400,810.65
  6. Step 6: Final answer
    x = 302,880.52

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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.