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Finding the Fourth Proportional to 670.70, 926.40 and 475.08

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Solution

The fourth proportional to 670.70, 926.40 and 475.08 is: 656.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.70 : 926.40 = 475.08 : x
  2. Step 2: Convert to fraction form
    670.70/926.40 = 475.08/x
  3. Step 3: Cross multiply
    670.70x = 926.40 × 475.08
  4. Step 4: Simplify right side
    670.70x = 440,114.11
  5. Step 5: Solve for x
    x = 440,114.11/670.70
  6. Step 6: Final answer
    x = 656.20

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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.