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Finding the Fourth Proportional to 607.84, 912.40 and 266.08

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Solution

The fourth proportional to 607.84, 912.40 and 266.08 is: 399.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.84 : 912.40 = 266.08 : x
  2. Step 2: Convert to fraction form
    607.84/912.40 = 266.08/x
  3. Step 3: Cross multiply
    607.84x = 912.40 × 266.08
  4. Step 4: Simplify right side
    607.84x = 242,771.39
  5. Step 5: Solve for x
    x = 242,771.39/607.84
  6. Step 6: Final answer
    x = 399.40

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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.