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Finding the Fourth Proportional to 1,574.12, 2,359.46 and 636.68

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Solution

The fourth proportional to 1,574.12, 2,359.46 and 636.68 is: 954.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.12 : 2,359.46 = 636.68 : x
  2. Step 2: Convert to fraction form
    1,574.12/2,359.46 = 636.68/x
  3. Step 3: Cross multiply
    1,574.12x = 2,359.46 × 636.68
  4. Step 4: Simplify right side
    1,574.12x = 1,502,206.01
  5. Step 5: Solve for x
    x = 1,502,206.01/1,574.12
  6. Step 6: Final answer
    x = 954.32

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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.