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Finding the Fourth Proportional to 261,262.67, 391,799.95 and 90,437.96

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Solution

The fourth proportional to 261,262.67, 391,799.95 and 90,437.96 is: 135,624.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,262.67 : 391,799.95 = 90,437.96 : x
  2. Step 2: Convert to fraction form
    261,262.67/391,799.95 = 90,437.96/x
  3. Step 3: Cross multiply
    261,262.67x = 391,799.95 × 90,437.96
  4. Step 4: Simplify right side
    261,262.67x = 35,433,588,959.51
  5. Step 5: Solve for x
    x = 35,433,588,959.51/261,262.67
  6. Step 6: Final answer
    x = 135,624.39

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1.5x scale

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.