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Finding the Fourth Proportional to 391,004.48, 539,307.90 and 358,842.89

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Solution

The fourth proportional to 391,004.48, 539,307.90 and 358,842.89 is: 494,947.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,004.48 : 539,307.90 = 358,842.89 : x
  2. Step 2: Convert to fraction form
    391,004.48/539,307.90 = 358,842.89/x
  3. Step 3: Cross multiply
    391,004.48x = 539,307.90 × 358,842.89
  4. Step 4: Simplify right side
    391,004.48x = 193,526,802,739.29
  5. Step 5: Solve for x
    x = 193,526,802,739.29/391,004.48
  6. Step 6: Final answer
    x = 494,947.80

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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.