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Finding the Fourth Proportional to 718,671.64, 991,812.18 and 412,843.72

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Solution

The fourth proportional to 718,671.64, 991,812.18 and 412,843.72 is: 569,750.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,671.64 : 991,812.18 = 412,843.72 : x
  2. Step 2: Convert to fraction form
    718,671.64/991,812.18 = 412,843.72/x
  3. Step 3: Cross multiply
    718,671.64x = 991,812.18 × 412,843.72
  4. Step 4: Simplify right side
    718,671.64x = 409,463,429,932.51
  5. Step 5: Solve for x
    x = 409,463,429,932.51/718,671.64
  6. Step 6: Final answer
    x = 569,750.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.