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Finding the Fourth Proportional to 954.20, 1,316.81 and 581.19

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Solution

The fourth proportional to 954.20, 1,316.81 and 581.19 is: 802.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.20 : 1,316.81 = 581.19 : x
  2. Step 2: Convert to fraction form
    954.20/1,316.81 = 581.19/x
  3. Step 3: Cross multiply
    954.20x = 1,316.81 × 581.19
  4. Step 4: Simplify right side
    954.20x = 765,316.80
  5. Step 5: Solve for x
    x = 765,316.80/954.20
  6. Step 6: Final answer
    x = 802.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.