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Finding the Fourth Proportional to 716,468.76, 988,695.72 and 394,158.42

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Solution

The fourth proportional to 716,468.76, 988,695.72 and 394,158.42 is: 543,921.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,468.76 : 988,695.72 = 394,158.42 : x
  2. Step 2: Convert to fraction form
    716,468.76/988,695.72 = 394,158.42/x
  3. Step 3: Cross multiply
    716,468.76x = 988,695.72 × 394,158.42
  4. Step 4: Simplify right side
    716,468.76x = 389,702,742,855.96
  5. Step 5: Solve for x
    x = 389,702,742,855.96/716,468.76
  6. Step 6: Final answer
    x = 543,921.47

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Double scale
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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.