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Finding the Fourth Proportional to 501.75, 692.28 and 305.19

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Solution

The fourth proportional to 501.75, 692.28 and 305.19 is: 421.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.75 : 692.28 = 305.19 : x
  2. Step 2: Convert to fraction form
    501.75/692.28 = 305.19/x
  3. Step 3: Cross multiply
    501.75x = 692.28 × 305.19
  4. Step 4: Simplify right side
    501.75x = 211,276.93
  5. Step 5: Solve for x
    x = 211,276.93/501.75
  6. Step 6: Final answer
    x = 421.08

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Double scale
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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.