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Finding the Fourth Proportional to 954.15, 1,316.98 and 581.38

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Solution

The fourth proportional to 954.15, 1,316.98 and 581.38 is: 802.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.15 : 1,316.98 = 581.38 : x
  2. Step 2: Convert to fraction form
    954.15/1,316.98 = 581.38/x
  3. Step 3: Cross multiply
    954.15x = 1,316.98 × 581.38
  4. Step 4: Simplify right side
    954.15x = 765,664.90
  5. Step 5: Solve for x
    x = 765,664.90/954.15
  6. Step 6: Final answer
    x = 802.45

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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.