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Finding the Fourth Proportional to 857.43, 1,183.55 and 503.47

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Solution

The fourth proportional to 857.43, 1,183.55 and 503.47 is: 694.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.43 : 1,183.55 = 503.47 : x
  2. Step 2: Convert to fraction form
    857.43/1,183.55 = 503.47/x
  3. Step 3: Cross multiply
    857.43x = 1,183.55 × 503.47
  4. Step 4: Simplify right side
    857.43x = 595,881.92
  5. Step 5: Solve for x
    x = 595,881.92/857.43
  6. Step 6: Final answer
    x = 694.96

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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.