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Finding the Fourth Proportional to 674,506.78, 930,872.44 and 384,130.64

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Solution

The fourth proportional to 674,506.78, 930,872.44 and 384,130.64 is: 530,130.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,506.78 : 930,872.44 = 384,130.64 : x
  2. Step 2: Convert to fraction form
    674,506.78/930,872.44 = 384,130.64/x
  3. Step 3: Cross multiply
    674,506.78x = 930,872.44 × 384,130.64
  4. Step 4: Simplify right side
    674,506.78x = 357,576,621,546.01
  5. Step 5: Solve for x
    x = 357,576,621,546.01/674,506.78
  6. Step 6: Final answer
    x = 530,130.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.