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Finding the Fourth Proportional to 665,345.93, 998,018.89 and 209,983.30

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Solution

The fourth proportional to 665,345.93, 998,018.89 and 209,983.30 is: 314,974.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,345.93 : 998,018.89 = 209,983.30 : x
  2. Step 2: Convert to fraction form
    665,345.93/998,018.89 = 209,983.30/x
  3. Step 3: Cross multiply
    665,345.93x = 998,018.89 × 209,983.30
  4. Step 4: Simplify right side
    665,345.93x = 209,567,296,964.53
  5. Step 5: Solve for x
    x = 209,567,296,964.53/665,345.93
  6. Step 6: Final answer
    x = 314,974.95

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.