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Finding the Fourth Proportional to 391,590.40, 586,996.80 and 180,860.80

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Solution

The fourth proportional to 391,590.40, 586,996.80 and 180,860.80 is: 271,111.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,590.40 : 586,996.80 = 180,860.80 : x
  2. Step 2: Convert to fraction form
    391,590.40/586,996.80 = 180,860.80/x
  3. Step 3: Cross multiply
    391,590.40x = 586,996.80 × 180,860.80
  4. Step 4: Simplify right side
    391,590.40x = 106,164,710,845.44
  5. Step 5: Solve for x
    x = 106,164,710,845.44/391,590.40
  6. Step 6: Final answer
    x = 271,111.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.