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Finding the Fourth Proportional to 611.67, 914.28 and 530.31

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Solution

The fourth proportional to 611.67, 914.28 and 530.31 is: 792.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.67 : 914.28 = 530.31 : x
  2. Step 2: Convert to fraction form
    611.67/914.28 = 530.31/x
  3. Step 3: Cross multiply
    611.67x = 914.28 × 530.31
  4. Step 4: Simplify right side
    611.67x = 484,851.83
  5. Step 5: Solve for x
    x = 484,851.83/611.67
  6. Step 6: Final answer
    x = 792.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.