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Finding the Fourth Proportional to 670.45, 924.79 and 430.80

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Solution

The fourth proportional to 670.45, 924.79 and 430.80 is: 594.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.45 : 924.79 = 430.80 : x
  2. Step 2: Convert to fraction form
    670.45/924.79 = 430.80/x
  3. Step 3: Cross multiply
    670.45x = 924.79 × 430.80
  4. Step 4: Simplify right side
    670.45x = 398,399.53
  5. Step 5: Solve for x
    x = 398,399.53/670.45
  6. Step 6: Final answer
    x = 594.23

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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.