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Finding the Fourth Proportional to 492,962.40, 739,443.60 and 391,485.60

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Solution

The fourth proportional to 492,962.40, 739,443.60 and 391,485.60 is: 587,228.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,962.40 : 739,443.60 = 391,485.60 : x
  2. Step 2: Convert to fraction form
    492,962.40/739,443.60 = 391,485.60/x
  3. Step 3: Cross multiply
    492,962.40x = 739,443.60 × 391,485.60
  4. Step 4: Simplify right side
    492,962.40x = 289,481,521,412.16
  5. Step 5: Solve for x
    x = 289,481,521,412.16/492,962.40
  6. Step 6: Final answer
    x = 587,228.40

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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.