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Finding the Fourth Proportional to 692.84, 955.85 and 430.40

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Solution

The fourth proportional to 692.84, 955.85 and 430.40 is: 593.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.84 : 955.85 = 430.40 : x
  2. Step 2: Convert to fraction form
    692.84/955.85 = 430.40/x
  3. Step 3: Cross multiply
    692.84x = 955.85 × 430.40
  4. Step 4: Simplify right side
    692.84x = 411,390.91
  5. Step 5: Solve for x
    x = 411,390.91/692.84
  6. Step 6: Final answer
    x = 593.78

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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.