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Finding the Fourth Proportional to 710.62, 980.67 and 430.90

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Solution

The fourth proportional to 710.62, 980.67 and 430.90 is: 594.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.62 : 980.67 = 430.90 : x
  2. Step 2: Convert to fraction form
    710.62/980.67 = 430.90/x
  3. Step 3: Cross multiply
    710.62x = 980.67 × 430.90
  4. Step 4: Simplify right side
    710.62x = 422,570.70
  5. Step 5: Solve for x
    x = 422,570.70/710.62
  6. Step 6: Final answer
    x = 594.65

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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.