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Finding the Fourth Proportional to 431,171.60, 647,329.64 and 368,395.12

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Solution

The fourth proportional to 431,171.60, 647,329.64 and 368,395.12 is: 553,081.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,171.60 : 647,329.64 = 368,395.12 : x
  2. Step 2: Convert to fraction form
    431,171.60/647,329.64 = 368,395.12/x
  3. Step 3: Cross multiply
    431,171.60x = 647,329.64 × 368,395.12
  4. Step 4: Simplify right side
    431,171.60x = 238,473,080,407.36
  5. Step 5: Solve for x
    x = 238,473,080,407.36/431,171.60
  6. Step 6: Final answer
    x = 553,081.60

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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.