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Finding the Fourth Proportional to 710.96, 1,070.63 and 620.72

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Solution

The fourth proportional to 710.96, 1,070.63 and 620.72 is: 934.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.96 : 1,070.63 = 620.72 : x
  2. Step 2: Convert to fraction form
    710.96/1,070.63 = 620.72/x
  3. Step 3: Cross multiply
    710.96x = 1,070.63 × 620.72
  4. Step 4: Simplify right side
    710.96x = 664,561.45
  5. Step 5: Solve for x
    x = 664,561.45/710.96
  6. Step 6: Final answer
    x = 934.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.