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Finding the Fourth Proportional to 606.76, 837.16 and 385.78

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Solution

The fourth proportional to 606.76, 837.16 and 385.78 is: 532.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.76 : 837.16 = 385.78 : x
  2. Step 2: Convert to fraction form
    606.76/837.16 = 385.78/x
  3. Step 3: Cross multiply
    606.76x = 837.16 × 385.78
  4. Step 4: Simplify right side
    606.76x = 322,959.58
  5. Step 5: Solve for x
    x = 322,959.58/606.76
  6. Step 6: Final answer
    x = 532.27

Related Problems

Find fourth proportional to 303.38, 418.58 and 192.89
Half scale
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Double scale
Find fourth proportional to 607.76, 838.54 and 386.78
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.