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Finding the Fourth Proportional to 572,780.65, 790,349.53 and 331,016.58

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Solution

The fourth proportional to 572,780.65, 790,349.53 and 331,016.58 is: 456,752.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,780.65 : 790,349.53 = 331,016.58 : x
  2. Step 2: Convert to fraction form
    572,780.65/790,349.53 = 331,016.58/x
  3. Step 3: Cross multiply
    572,780.65x = 790,349.53 × 331,016.58
  4. Step 4: Simplify right side
    572,780.65x = 261,618,798,425.21
  5. Step 5: Solve for x
    x = 261,618,798,425.21/572,780.65
  6. Step 6: Final answer
    x = 456,752.16

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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.