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Finding the Fourth Proportional to 615.63, 923.43 and 290.76

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Solution

The fourth proportional to 615.63, 923.43 and 290.76 is: 436.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.63 : 923.43 = 290.76 : x
  2. Step 2: Convert to fraction form
    615.63/923.43 = 290.76/x
  3. Step 3: Cross multiply
    615.63x = 923.43 × 290.76
  4. Step 4: Simplify right side
    615.63x = 268,496.51
  5. Step 5: Solve for x
    x = 268,496.51/615.63
  6. Step 6: Final answer
    x = 436.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.