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Finding the Fourth Proportional to 614.76, 848.50 and 378.88

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Solution

The fourth proportional to 614.76, 848.50 and 378.88 is: 522.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.76 : 848.50 = 378.88 : x
  2. Step 2: Convert to fraction form
    614.76/848.50 = 378.88/x
  3. Step 3: Cross multiply
    614.76x = 848.50 × 378.88
  4. Step 4: Simplify right side
    614.76x = 321,479.68
  5. Step 5: Solve for x
    x = 321,479.68/614.76
  6. Step 6: Final answer
    x = 522.94

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Find fourth proportional to 307.38, 424.25 and 189.44
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Double scale
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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.