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Finding the Fourth Proportional to 783.64, 1,081.02 and 503.38

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Solution

The fourth proportional to 783.64, 1,081.02 and 503.38 is: 694.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.64 : 1,081.02 = 503.38 : x
  2. Step 2: Convert to fraction form
    783.64/1,081.02 = 503.38/x
  3. Step 3: Cross multiply
    783.64x = 1,081.02 × 503.38
  4. Step 4: Simplify right side
    783.64x = 544,163.85
  5. Step 5: Solve for x
    x = 544,163.85/783.64
  6. Step 6: Final answer
    x = 694.41

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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.