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Finding the Fourth Proportional to 710.28, 980.15 and 430.43

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Solution

The fourth proportional to 710.28, 980.15 and 430.43 is: 593.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.28 : 980.15 = 430.43 : x
  2. Step 2: Convert to fraction form
    710.28/980.15 = 430.43/x
  3. Step 3: Cross multiply
    710.28x = 980.15 × 430.43
  4. Step 4: Simplify right side
    710.28x = 421,878.91
  5. Step 5: Solve for x
    x = 421,878.91/710.28
  6. Step 6: Final answer
    x = 593.96

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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.