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Finding the Fourth Proportional to 498,857.70, 748,286.55 and 445,980.90

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Solution

The fourth proportional to 498,857.70, 748,286.55 and 445,980.90 is: 668,971.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,857.70 : 748,286.55 = 445,980.90 : x
  2. Step 2: Convert to fraction form
    498,857.70/748,286.55 = 445,980.90/x
  3. Step 3: Cross multiply
    498,857.70x = 748,286.55 × 445,980.90
  4. Step 4: Simplify right side
    498,857.70x = 333,721,509,026.90
  5. Step 5: Solve for x
    x = 333,721,509,026.90/498,857.70
  6. Step 6: Final answer
    x = 668,971.35

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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.