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Finding the Fourth Proportional to 1,110.99, 1,666.17 and 417.15

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Solution

The fourth proportional to 1,110.99, 1,666.17 and 417.15 is: 625.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.99 : 1,666.17 = 417.15 : x
  2. Step 2: Convert to fraction form
    1,110.99/1,666.17 = 417.15/x
  3. Step 3: Cross multiply
    1,110.99x = 1,666.17 × 417.15
  4. Step 4: Simplify right side
    1,110.99x = 695,042.82
  5. Step 5: Solve for x
    x = 695,042.82/1,110.99
  6. Step 6: Final answer
    x = 625.61

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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.