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Finding the Fourth Proportional to 328,680.65, 450,290.35 and 316,389.91

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Solution

The fourth proportional to 328,680.65, 450,290.35 and 316,389.91 is: 433,452.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,680.65 : 450,290.35 = 316,389.91 : x
  2. Step 2: Convert to fraction form
    328,680.65/450,290.35 = 316,389.91/x
  3. Step 3: Cross multiply
    328,680.65x = 450,290.35 × 316,389.91
  4. Step 4: Simplify right side
    328,680.65x = 142,467,323,310.37
  5. Step 5: Solve for x
    x = 142,467,323,310.37/328,680.65
  6. Step 6: Final answer
    x = 433,452.12

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.