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Finding the Fourth Proportional to 644,584.40, 965,839.80 and 407,502.80

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Solution

The fourth proportional to 644,584.40, 965,839.80 and 407,502.80 is: 610,598.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,584.40 : 965,839.80 = 407,502.80 : x
  2. Step 2: Convert to fraction form
    644,584.40/965,839.80 = 407,502.80/x
  3. Step 3: Cross multiply
    644,584.40x = 965,839.80 × 407,502.80
  4. Step 4: Simplify right side
    644,584.40x = 393,582,422,851.44
  5. Step 5: Solve for x
    x = 393,582,422,851.44/644,584.40
  6. Step 6: Final answer
    x = 610,598.74

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1.5x scale

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.