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Finding the Fourth Proportional to 954.20, 1,313.88 and 718.49

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Solution

The fourth proportional to 954.20, 1,313.88 and 718.49 is: 989.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.20 : 1,313.88 = 718.49 : x
  2. Step 2: Convert to fraction form
    954.20/1,313.88 = 718.49/x
  3. Step 3: Cross multiply
    954.20x = 1,313.88 × 718.49
  4. Step 4: Simplify right side
    954.20x = 944,009.64
  5. Step 5: Solve for x
    x = 944,009.64/954.20
  6. Step 6: Final answer
    x = 989.32

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1.5x scale

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.