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Finding the Fourth Proportional to 385.33, 530.45 and 348.37

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Solution

The fourth proportional to 385.33, 530.45 and 348.37 is: 479.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.33 : 530.45 = 348.37 : x
  2. Step 2: Convert to fraction form
    385.33/530.45 = 348.37/x
  3. Step 3: Cross multiply
    385.33x = 530.45 × 348.37
  4. Step 4: Simplify right side
    385.33x = 184,792.87
  5. Step 5: Solve for x
    x = 184,792.87/385.33
  6. Step 6: Final answer
    x = 479.57

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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.