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Finding the Fourth Proportional to 692.40, 955.32 and 430.20

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Solution

The fourth proportional to 692.40, 955.32 and 430.20 is: 593.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.40 : 955.32 = 430.20 : x
  2. Step 2: Convert to fraction form
    692.40/955.32 = 430.20/x
  3. Step 3: Cross multiply
    692.40x = 955.32 × 430.20
  4. Step 4: Simplify right side
    692.40x = 410,978.66
  5. Step 5: Solve for x
    x = 410,978.66/692.40
  6. Step 6: Final answer
    x = 593.56

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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.