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Finding the Fourth Proportional to 385.07, 530.23 and 274.35

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Solution

The fourth proportional to 385.07, 530.23 and 274.35 is: 377.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.07 : 530.23 = 274.35 : x
  2. Step 2: Convert to fraction form
    385.07/530.23 = 274.35/x
  3. Step 3: Cross multiply
    385.07x = 530.23 × 274.35
  4. Step 4: Simplify right side
    385.07x = 145,468.60
  5. Step 5: Solve for x
    x = 145,468.60/385.07
  6. Step 6: Final answer
    x = 377.77

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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.