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Finding the Fourth Proportional to 615.08, 921.60 and 340.49

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Solution

The fourth proportional to 615.08, 921.60 and 340.49 is: 510.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.08 : 921.60 = 340.49 : x
  2. Step 2: Convert to fraction form
    615.08/921.60 = 340.49/x
  3. Step 3: Cross multiply
    615.08x = 921.60 × 340.49
  4. Step 4: Simplify right side
    615.08x = 313,795.58
  5. Step 5: Solve for x
    x = 313,795.58/615.08
  6. Step 6: Final answer
    x = 510.17

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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.