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Finding the Fourth Proportional to 661,595.76, 992,559.96 and 212,356.80

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Solution

The fourth proportional to 661,595.76, 992,559.96 and 212,356.80 is: 318,588.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,595.76 : 992,559.96 = 212,356.80 : x
  2. Step 2: Convert to fraction form
    661,595.76/992,559.96 = 212,356.80/x
  3. Step 3: Cross multiply
    661,595.76x = 992,559.96 × 212,356.80
  4. Step 4: Simplify right side
    661,595.76x = 210,776,856,913.73
  5. Step 5: Solve for x
    x = 210,776,856,913.73/661,595.76
  6. Step 6: Final answer
    x = 318,588.58

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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.