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Finding the Fourth Proportional to 651,871.20, 978,244.20 and 385,348.80

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Solution

The fourth proportional to 651,871.20, 978,244.20 and 385,348.80 is: 578,281.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,871.20 : 978,244.20 = 385,348.80 : x
  2. Step 2: Convert to fraction form
    651,871.20/978,244.20 = 385,348.80/x
  3. Step 3: Cross multiply
    651,871.20x = 978,244.20 × 385,348.80
  4. Step 4: Simplify right side
    651,871.20x = 376,965,228,576.96
  5. Step 5: Solve for x
    x = 376,965,228,576.96/651,871.20
  6. Step 6: Final answer
    x = 578,281.77

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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.