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Finding the Fourth Proportional to 875.45, 1,312.19 and 441.69

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Solution

The fourth proportional to 875.45, 1,312.19 and 441.69 is: 662.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.45 : 1,312.19 = 441.69 : x
  2. Step 2: Convert to fraction form
    875.45/1,312.19 = 441.69/x
  3. Step 3: Cross multiply
    875.45x = 1,312.19 × 441.69
  4. Step 4: Simplify right side
    875.45x = 579,578.99
  5. Step 5: Solve for x
    x = 579,578.99/875.45
  6. Step 6: Final answer
    x = 662.04

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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.