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Finding the Fourth Proportional to 661,353.12, 992,191.68 and 212,075.28

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Solution

The fourth proportional to 661,353.12, 992,191.68 and 212,075.28 is: 318,164.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,353.12 : 992,191.68 = 212,075.28 : x
  2. Step 2: Convert to fraction form
    661,353.12/992,191.68 = 212,075.28/x
  3. Step 3: Cross multiply
    661,353.12x = 992,191.68 × 212,075.28
  4. Step 4: Simplify right side
    661,353.12x = 210,419,328,349.67
  5. Step 5: Solve for x
    x = 210,419,328,349.67/661,353.12
  6. Step 6: Final answer
    x = 318,164.87

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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.