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Finding the Fourth Proportional to 940.72, 1,411.04 and 291.45

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Solution

The fourth proportional to 940.72, 1,411.04 and 291.45 is: 437.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.72 : 1,411.04 = 291.45 : x
  2. Step 2: Convert to fraction form
    940.72/1,411.04 = 291.45/x
  3. Step 3: Cross multiply
    940.72x = 1,411.04 × 291.45
  4. Step 4: Simplify right side
    940.72x = 411,239.10
  5. Step 5: Solve for x
    x = 411,239.10/940.72
  6. Step 6: Final answer
    x = 437.16

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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.