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Finding the Fourth Proportional to 661,477.14, 992,122.29 and 212,139.63

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Solution

The fourth proportional to 661,477.14, 992,122.29 and 212,139.63 is: 318,179.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,477.14 : 992,122.29 = 212,139.63 : x
  2. Step 2: Convert to fraction form
    661,477.14/992,122.29 = 212,139.63/x
  3. Step 3: Cross multiply
    661,477.14x = 992,122.29 × 212,139.63
  4. Step 4: Simplify right side
    661,477.14x = 210,468,455,515.35
  5. Step 5: Solve for x
    x = 210,468,455,515.35/661,477.14
  6. Step 6: Final answer
    x = 318,179.48

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1.5x scale

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.