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Finding the Fourth Proportional to 783.50, 1,081.20 and 452.04

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Solution

The fourth proportional to 783.50, 1,081.20 and 452.04 is: 623.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.50 : 1,081.20 = 452.04 : x
  2. Step 2: Convert to fraction form
    783.50/1,081.20 = 452.04/x
  3. Step 3: Cross multiply
    783.50x = 1,081.20 × 452.04
  4. Step 4: Simplify right side
    783.50x = 488,741.51
  5. Step 5: Solve for x
    x = 488,741.51/783.50
  6. Step 6: Final answer
    x = 623.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.