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Finding the Fourth Proportional to 615.40, 923.16 and 290.58

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Solution

The fourth proportional to 615.40, 923.16 and 290.58 is: 435.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.40 : 923.16 = 290.58 : x
  2. Step 2: Convert to fraction form
    615.40/923.16 = 290.58/x
  3. Step 3: Cross multiply
    615.40x = 923.16 × 290.58
  4. Step 4: Simplify right side
    615.40x = 268,251.83
  5. Step 5: Solve for x
    x = 268,251.83/615.40
  6. Step 6: Final answer
    x = 435.90

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1.5x scale

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.