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Finding the Fourth Proportional to 710.18, 1,065.27 and 402.05

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Solution

The fourth proportional to 710.18, 1,065.27 and 402.05 is: 603.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.18 : 1,065.27 = 402.05 : x
  2. Step 2: Convert to fraction form
    710.18/1,065.27 = 402.05/x
  3. Step 3: Cross multiply
    710.18x = 1,065.27 × 402.05
  4. Step 4: Simplify right side
    710.18x = 428,284.47
  5. Step 5: Solve for x
    x = 428,284.47/710.18
  6. Step 6: Final answer
    x = 603.07

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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.