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Finding the Fourth Proportional to 947.20, 1,307.12 and 533.20

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Solution

The fourth proportional to 947.20, 1,307.12 and 533.20 is: 735.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.20 : 1,307.12 = 533.20 : x
  2. Step 2: Convert to fraction form
    947.20/1,307.12 = 533.20/x
  3. Step 3: Cross multiply
    947.20x = 1,307.12 × 533.20
  4. Step 4: Simplify right side
    947.20x = 696,956.38
  5. Step 5: Solve for x
    x = 696,956.38/947.20
  6. Step 6: Final answer
    x = 735.81

Related Problems

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Half scale
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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.