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Finding the Fourth Proportional to 710.24, 1,070.08 and 641.84

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Solution

The fourth proportional to 710.24, 1,070.08 and 641.84 is: 967.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.24 : 1,070.08 = 641.84 : x
  2. Step 2: Convert to fraction form
    710.24/1,070.08 = 641.84/x
  3. Step 3: Cross multiply
    710.24x = 1,070.08 × 641.84
  4. Step 4: Simplify right side
    710.24x = 686,820.15
  5. Step 5: Solve for x
    x = 686,820.15/710.24
  6. Step 6: Final answer
    x = 967.03

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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.