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Finding the Fourth Proportional to 607.68, 838.98 and 421.10

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Solution

The fourth proportional to 607.68, 838.98 and 421.10 is: 581.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.68 : 838.98 = 421.10 : x
  2. Step 2: Convert to fraction form
    607.68/838.98 = 421.10/x
  3. Step 3: Cross multiply
    607.68x = 838.98 × 421.10
  4. Step 4: Simplify right side
    607.68x = 353,296.58
  5. Step 5: Solve for x
    x = 353,296.58/607.68
  6. Step 6: Final answer
    x = 581.39

Related Problems

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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.