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Finding the Fourth Proportional to 642,608.20, 962,990.70 and 472,803.40

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Solution

The fourth proportional to 642,608.20, 962,990.70 and 472,803.40 is: 708,527.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,608.20 : 962,990.70 = 472,803.40 : x
  2. Step 2: Convert to fraction form
    642,608.20/962,990.70 = 472,803.40/x
  3. Step 3: Cross multiply
    642,608.20x = 962,990.70 × 472,803.40
  4. Step 4: Simplify right side
    642,608.20x = 455,305,277,128.38
  5. Step 5: Solve for x
    x = 455,305,277,128.38/642,608.20
  6. Step 6: Final answer
    x = 708,527.03

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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.