Home / 391,175.48-539,835-221,405.96

Finding the Fourth Proportional to 391,175.48, 539,835 and 221,405.96

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Solution

The fourth proportional to 391,175.48, 539,835 and 221,405.96 is: 305,547.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,175.48 : 539,835 = 221,405.96 : x
  2. Step 2: Convert to fraction form
    391,175.48/539,835 = 221,405.96/x
  3. Step 3: Cross multiply
    391,175.48x = 539,835 × 221,405.96
  4. Step 4: Simplify right side
    391,175.48x = 119,522,686,416.60
  5. Step 5: Solve for x
    x = 119,522,686,416.60/391,175.48
  6. Step 6: Final answer
    x = 305,547.49

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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.