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Finding the Fourth Proportional to 710.66, 1,065.72 and 345.62

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Solution

The fourth proportional to 710.66, 1,065.72 and 345.62 is: 518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.66 : 1,065.72 = 345.62 : x
  2. Step 2: Convert to fraction form
    710.66/1,065.72 = 345.62/x
  3. Step 3: Cross multiply
    710.66x = 1,065.72 × 345.62
  4. Step 4: Simplify right side
    710.66x = 368,334.15
  5. Step 5: Solve for x
    x = 368,334.15/710.66
  6. Step 6: Final answer
    x = 518.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.