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Finding the Fourth Proportional to 710.01, 978.21 and 622.53

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Solution

The fourth proportional to 710.01, 978.21 and 622.53 is: 857.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.01 : 978.21 = 622.53 : x
  2. Step 2: Convert to fraction form
    710.01/978.21 = 622.53/x
  3. Step 3: Cross multiply
    710.01x = 978.21 × 622.53
  4. Step 4: Simplify right side
    710.01x = 608,965.07
  5. Step 5: Solve for x
    x = 608,965.07/710.01
  6. Step 6: Final answer
    x = 857.69

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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.