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Finding the Fourth Proportional to 642,733.20, 965,136.60 and 485,139.60

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Solution

The fourth proportional to 642,733.20, 965,136.60 and 485,139.60 is: 728,491.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,733.20 : 965,136.60 = 485,139.60 : x
  2. Step 2: Convert to fraction form
    642,733.20/965,136.60 = 485,139.60/x
  3. Step 3: Cross multiply
    642,733.20x = 965,136.60 × 485,139.60
  4. Step 4: Simplify right side
    642,733.20x = 468,225,984,069.36
  5. Step 5: Solve for x
    x = 468,225,984,069.36/642,733.20
  6. Step 6: Final answer
    x = 728,491.98

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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.