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Finding the Fourth Proportional to 615.61, 923.15 and 307.09

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Solution

The fourth proportional to 615.61, 923.15 and 307.09 is: 460.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.61 : 923.15 = 307.09 : x
  2. Step 2: Convert to fraction form
    615.61/923.15 = 307.09/x
  3. Step 3: Cross multiply
    615.61x = 923.15 × 307.09
  4. Step 4: Simplify right side
    615.61x = 283,492.27
  5. Step 5: Solve for x
    x = 283,492.27/615.61
  6. Step 6: Final answer
    x = 460.51

Related Problems

Find fourth proportional to 307.80, 461.58 and 153.55
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.