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Finding the Fourth Proportional to 614.76, 848.25 and 381.78

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Solution

The fourth proportional to 614.76, 848.25 and 381.78 is: 526.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.76 : 848.25 = 381.78 : x
  2. Step 2: Convert to fraction form
    614.76/848.25 = 381.78/x
  3. Step 3: Cross multiply
    614.76x = 848.25 × 381.78
  4. Step 4: Simplify right side
    614.76x = 323,844.89
  5. Step 5: Solve for x
    x = 323,844.89/614.76
  6. Step 6: Final answer
    x = 526.78

Related Problems

Find fourth proportional to 307.38, 424.13 and 190.89
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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.