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Finding the Fourth Proportional to 615.01, 920.68 and 614.20

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Solution

The fourth proportional to 615.01, 920.68 and 614.20 is: 919.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.01 : 920.68 = 614.20 : x
  2. Step 2: Convert to fraction form
    615.01/920.68 = 614.20/x
  3. Step 3: Cross multiply
    615.01x = 920.68 × 614.20
  4. Step 4: Simplify right side
    615.01x = 565,477.82
  5. Step 5: Solve for x
    x = 565,477.82/615.01
  6. Step 6: Final answer
    x = 919.47

Related Problems

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Half scale
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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.