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Finding the Fourth Proportional to 410,142.40, 614,752.80 and 210,385.60

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Solution

The fourth proportional to 410,142.40, 614,752.80 and 210,385.60 is: 315,342.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,142.40 : 614,752.80 = 210,385.60 : x
  2. Step 2: Convert to fraction form
    410,142.40/614,752.80 = 210,385.60/x
  3. Step 3: Cross multiply
    410,142.40x = 614,752.80 × 210,385.60
  4. Step 4: Simplify right side
    410,142.40x = 129,335,136,679.68
  5. Step 5: Solve for x
    x = 129,335,136,679.68/410,142.40
  6. Step 6: Final answer
    x = 315,342.03

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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.