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Finding the Fourth Proportional to 518,291.20, 714,997.38 and 303,298.21

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Solution

The fourth proportional to 518,291.20, 714,997.38 and 303,298.21 is: 418,408.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,291.20 : 714,997.38 = 303,298.21 : x
  2. Step 2: Convert to fraction form
    518,291.20/714,997.38 = 303,298.21/x
  3. Step 3: Cross multiply
    518,291.20x = 714,997.38 × 303,298.21
  4. Step 4: Simplify right side
    518,291.20x = 216,857,425,508.69
  5. Step 5: Solve for x
    x = 216,857,425,508.69/518,291.20
  6. Step 6: Final answer
    x = 418,408.47

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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.