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Finding the Fourth Proportional to 710.12, 1,065.40 and 499.26

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Solution

The fourth proportional to 710.12, 1,065.40 and 499.26 is: 749.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.12 : 1,065.40 = 499.26 : x
  2. Step 2: Convert to fraction form
    710.12/1,065.40 = 499.26/x
  3. Step 3: Cross multiply
    710.12x = 1,065.40 × 499.26
  4. Step 4: Simplify right side
    710.12x = 531,917.16
  5. Step 5: Solve for x
    x = 531,917.16/710.12
  6. Step 6: Final answer
    x = 749.06

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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.