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Finding the Fourth Proportional to 1,065.99, 1,600.61 and 417.99

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Solution

The fourth proportional to 1,065.99, 1,600.61 and 417.99 is: 627.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.99 : 1,600.61 = 417.99 : x
  2. Step 2: Convert to fraction form
    1,065.99/1,600.61 = 417.99/x
  3. Step 3: Cross multiply
    1,065.99x = 1,600.61 × 417.99
  4. Step 4: Simplify right side
    1,065.99x = 669,038.97
  5. Step 5: Solve for x
    x = 669,038.97/1,065.99
  6. Step 6: Final answer
    x = 627.62

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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.