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Finding the Fourth Proportional to 1,124.55, 1,685.67 and 393.63

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Solution

The fourth proportional to 1,124.55, 1,685.67 and 393.63 is: 590.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.55 : 1,685.67 = 393.63 : x
  2. Step 2: Convert to fraction form
    1,124.55/1,685.67 = 393.63/x
  3. Step 3: Cross multiply
    1,124.55x = 1,685.67 × 393.63
  4. Step 4: Simplify right side
    1,124.55x = 663,530.28
  5. Step 5: Solve for x
    x = 663,530.28/1,124.55
  6. Step 6: Final answer
    x = 590.04

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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.