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Finding the Fourth Proportional to 615.38, 923.69 and 307.45

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Solution

The fourth proportional to 615.38, 923.69 and 307.45 is: 461.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.38 : 923.69 = 307.45 : x
  2. Step 2: Convert to fraction form
    615.38/923.69 = 307.45/x
  3. Step 3: Cross multiply
    615.38x = 923.69 × 307.45
  4. Step 4: Simplify right side
    615.38x = 283,988.68
  5. Step 5: Solve for x
    x = 283,988.68/615.38
  6. Step 6: Final answer
    x = 461.49

Related Problems

Find fourth proportional to 307.69, 461.85 and 153.72
Half scale
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Double scale
Find fourth proportional to 616.38, 925.19 and 308.45
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.