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Finding the Fourth Proportional to 1,190.40, 1,785.16 and 410.19

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Solution

The fourth proportional to 1,190.40, 1,785.16 and 410.19 is: 615.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.40 : 1,785.16 = 410.19 : x
  2. Step 2: Convert to fraction form
    1,190.40/1,785.16 = 410.19/x
  3. Step 3: Cross multiply
    1,190.40x = 1,785.16 × 410.19
  4. Step 4: Simplify right side
    1,190.40x = 732,254.78
  5. Step 5: Solve for x
    x = 732,254.78/1,190.40
  6. Step 6: Final answer
    x = 615.13

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Double scale
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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.