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Finding the Fourth Proportional to 291,986.12, 437,978.20 and 70,370.12

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Solution

The fourth proportional to 291,986.12, 437,978.20 and 70,370.12 is: 105,554.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,986.12 : 437,978.20 = 70,370.12 : x
  2. Step 2: Convert to fraction form
    291,986.12/437,978.20 = 70,370.12/x
  3. Step 3: Cross multiply
    291,986.12x = 437,978.20 × 70,370.12
  4. Step 4: Simplify right side
    291,986.12x = 30,820,578,491.38
  5. Step 5: Solve for x
    x = 30,820,578,491.38/291,986.12
  6. Step 6: Final answer
    x = 105,554.94

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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.