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Finding the Fourth Proportional to 947.06, 1,307.45 and 615.68

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Solution

The fourth proportional to 947.06, 1,307.45 and 615.68 is: 849.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.06 : 1,307.45 = 615.68 : x
  2. Step 2: Convert to fraction form
    947.06/1,307.45 = 615.68/x
  3. Step 3: Cross multiply
    947.06x = 1,307.45 × 615.68
  4. Step 4: Simplify right side
    947.06x = 804,970.82
  5. Step 5: Solve for x
    x = 804,970.82/947.06
  6. Step 6: Final answer
    x = 849.97

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Double scale
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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.