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Finding the Fourth Proportional to 1,190.48, 1,785.64 and 410.32

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Solution

The fourth proportional to 1,190.48, 1,785.64 and 410.32 is: 615.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.48 : 1,785.64 = 410.32 : x
  2. Step 2: Convert to fraction form
    1,190.48/1,785.64 = 410.32/x
  3. Step 3: Cross multiply
    1,190.48x = 1,785.64 × 410.32
  4. Step 4: Simplify right side
    1,190.48x = 732,683.80
  5. Step 5: Solve for x
    x = 732,683.80/1,190.48
  6. Step 6: Final answer
    x = 615.45

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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.