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Finding the Fourth Proportional to 947.48, 1,308.77 and 729.12

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Solution

The fourth proportional to 947.48, 1,308.77 and 729.12 is: 1,007.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.48 : 1,308.77 = 729.12 : x
  2. Step 2: Convert to fraction form
    947.48/1,308.77 = 729.12/x
  3. Step 3: Cross multiply
    947.48x = 1,308.77 × 729.12
  4. Step 4: Simplify right side
    947.48x = 954,246.74
  5. Step 5: Solve for x
    x = 954,246.74/947.48
  6. Step 6: Final answer
    x = 1,007.15

Related Problems

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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.