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Finding the Fourth Proportional to 953.19, 1,428.17 and 605.70

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Solution

The fourth proportional to 953.19, 1,428.17 and 605.70 is: 907.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.19 : 1,428.17 = 605.70 : x
  2. Step 2: Convert to fraction form
    953.19/1,428.17 = 605.70/x
  3. Step 3: Cross multiply
    953.19x = 1,428.17 × 605.70
  4. Step 4: Simplify right side
    953.19x = 865,039.54
  5. Step 5: Solve for x
    x = 865,039.54/953.19
  6. Step 6: Final answer
    x = 907.52

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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.