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Finding the Fourth Proportional to 617.40, 851.40 and 368.76

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Solution

The fourth proportional to 617.40, 851.40 and 368.76 is: 508.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.40 : 851.40 = 368.76 : x
  2. Step 2: Convert to fraction form
    617.40/851.40 = 368.76/x
  3. Step 3: Cross multiply
    617.40x = 851.40 × 368.76
  4. Step 4: Simplify right side
    617.40x = 313,962.26
  5. Step 5: Solve for x
    x = 313,962.26/617.40
  6. Step 6: Final answer
    x = 508.52

Related Problems

Find fourth proportional to 308.70, 425.70 and 184.38
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.