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Finding the Fourth Proportional to 642,630.40, 963,772.80 and 193,350.40

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Solution

The fourth proportional to 642,630.40, 963,772.80 and 193,350.40 is: 289,973.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,630.40 : 963,772.80 = 193,350.40 : x
  2. Step 2: Convert to fraction form
    642,630.40/963,772.80 = 193,350.40/x
  3. Step 3: Cross multiply
    642,630.40x = 963,772.80 × 193,350.40
  4. Step 4: Simplify right side
    642,630.40x = 186,345,856,389.12
  5. Step 5: Solve for x
    x = 186,345,856,389.12/642,630.40
  6. Step 6: Final answer
    x = 289,973.61

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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.