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Finding the Fourth Proportional to 459.35, 689.03 and 378.02

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Solution

The fourth proportional to 459.35, 689.03 and 378.02 is: 567.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.35 : 689.03 = 378.02 : x
  2. Step 2: Convert to fraction form
    459.35/689.03 = 378.02/x
  3. Step 3: Cross multiply
    459.35x = 689.03 × 378.02
  4. Step 4: Simplify right side
    459.35x = 260,465.23
  5. Step 5: Solve for x
    x = 260,465.23/459.35
  6. Step 6: Final answer
    x = 567.03

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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.