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Finding the Fourth Proportional to 923.30, 1,274.38 and 530.56

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Solution

The fourth proportional to 923.30, 1,274.38 and 530.56 is: 732.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.30 : 1,274.38 = 530.56 : x
  2. Step 2: Convert to fraction form
    923.30/1,274.38 = 530.56/x
  3. Step 3: Cross multiply
    923.30x = 1,274.38 × 530.56
  4. Step 4: Simplify right side
    923.30x = 676,135.05
  5. Step 5: Solve for x
    x = 676,135.05/923.30
  6. Step 6: Final answer
    x = 732.30

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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.