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Finding the Fourth Proportional to 661,670.80, 992,672.48 and 212,431.84

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Solution

The fourth proportional to 661,670.80, 992,672.48 and 212,431.84 is: 318,701.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,670.80 : 992,672.48 = 212,431.84 : x
  2. Step 2: Convert to fraction form
    661,670.80/992,672.48 = 212,431.84/x
  3. Step 3: Cross multiply
    661,670.80x = 992,672.48 × 212,431.84
  4. Step 4: Simplify right side
    661,670.80x = 210,875,241,443.76
  5. Step 5: Solve for x
    x = 210,875,241,443.76/661,670.80
  6. Step 6: Final answer
    x = 318,701.14

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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.