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Finding the Fourth Proportional to 661,666.80, 992,666.48 and 212,427.84

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Solution

The fourth proportional to 661,666.80, 992,666.48 and 212,427.84 is: 318,695.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,666.80 : 992,666.48 = 212,427.84 : x
  2. Step 2: Convert to fraction form
    661,666.80/992,666.48 = 212,427.84/x
  3. Step 3: Cross multiply
    661,666.80x = 992,666.48 × 212,427.84
  4. Step 4: Simplify right side
    661,666.80x = 210,869,996,186.80
  5. Step 5: Solve for x
    x = 210,869,996,186.80/661,666.80
  6. Step 6: Final answer
    x = 318,695.14

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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.