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Finding the Fourth Proportional to 503.32, 696.18 and 445

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Solution

The fourth proportional to 503.32, 696.18 and 445 is: 615.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.32 : 696.18 = 445 : x
  2. Step 2: Convert to fraction form
    503.32/696.18 = 445/x
  3. Step 3: Cross multiply
    503.32x = 696.18 × 445
  4. Step 4: Simplify right side
    503.32x = 309,800.10
  5. Step 5: Solve for x
    x = 309,800.10/503.32
  6. Step 6: Final answer
    x = 615.51

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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.