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Finding the Fourth Proportional to 1,299.86, 1,948.56 and 433.56

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Solution

The fourth proportional to 1,299.86, 1,948.56 and 433.56 is: 649.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.86 : 1,948.56 = 433.56 : x
  2. Step 2: Convert to fraction form
    1,299.86/1,948.56 = 433.56/x
  3. Step 3: Cross multiply
    1,299.86x = 1,948.56 × 433.56
  4. Step 4: Simplify right side
    1,299.86x = 844,817.67
  5. Step 5: Solve for x
    x = 844,817.67/1,299.86
  6. Step 6: Final answer
    x = 649.93

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Half scale
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Double scale
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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.