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Finding the Fourth Proportional to 615.60, 923.40 and 417.49

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Solution

The fourth proportional to 615.60, 923.40 and 417.49 is: 626.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.60 : 923.40 = 417.49 : x
  2. Step 2: Convert to fraction form
    615.60/923.40 = 417.49/x
  3. Step 3: Cross multiply
    615.60x = 923.40 × 417.49
  4. Step 4: Simplify right side
    615.60x = 385,507.96
  5. Step 5: Solve for x
    x = 385,507.96/615.60
  6. Step 6: Final answer
    x = 626.23

Related Problems

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Double scale
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Similar ratio
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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.