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Finding the Fourth Proportional to 385,537.69, 531,978.53 and 242,196.21

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Solution

The fourth proportional to 385,537.69, 531,978.53 and 242,196.21 is: 334,190.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,537.69 : 531,978.53 = 242,196.21 : x
  2. Step 2: Convert to fraction form
    385,537.69/531,978.53 = 242,196.21/x
  3. Step 3: Cross multiply
    385,537.69x = 531,978.53 × 242,196.21
  4. Step 4: Simplify right side
    385,537.69x = 128,843,182,556.39
  5. Step 5: Solve for x
    x = 128,843,182,556.39/385,537.69
  6. Step 6: Final answer
    x = 334,190.89

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1.5x scale

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.