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Finding the Fourth Proportional to 261,261.81, 391,798.68 and 90,437.11

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Solution

The fourth proportional to 261,261.81, 391,798.68 and 90,437.11 is: 135,623.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,261.81 : 391,798.68 = 90,437.11 : x
  2. Step 2: Convert to fraction form
    261,261.81/391,798.68 = 90,437.11/x
  3. Step 3: Cross multiply
    261,261.81x = 391,798.68 × 90,437.11
  4. Step 4: Simplify right side
    261,261.81x = 35,433,140,321.01
  5. Step 5: Solve for x
    x = 35,433,140,321.01/261,261.81
  6. Step 6: Final answer
    x = 135,623.11

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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.