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Finding the Fourth Proportional to 947.12, 1,312.09 and 924.44

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Solution

The fourth proportional to 947.12, 1,312.09 and 924.44 is: 1,280.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.12 : 1,312.09 = 924.44 : x
  2. Step 2: Convert to fraction form
    947.12/1,312.09 = 924.44/x
  3. Step 3: Cross multiply
    947.12x = 1,312.09 × 924.44
  4. Step 4: Simplify right side
    947.12x = 1,212,939.61
  5. Step 5: Solve for x
    x = 1,212,939.61/947.12
  6. Step 6: Final answer
    x = 1,280.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.