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Finding the Fourth Proportional to 720,061.76, 993,743.35 and 397,800.02

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Solution

The fourth proportional to 720,061.76, 993,743.35 and 397,800.02 is: 548,996.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,061.76 : 993,743.35 = 397,800.02 : x
  2. Step 2: Convert to fraction form
    720,061.76/993,743.35 = 397,800.02/x
  3. Step 3: Cross multiply
    720,061.76x = 993,743.35 × 397,800.02
  4. Step 4: Simplify right side
    720,061.76x = 395,311,118,541.65
  5. Step 5: Solve for x
    x = 395,311,118,541.65/720,061.76
  6. Step 6: Final answer
    x = 548,996.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.