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Finding the Fourth Proportional to 720,199.93, 993,864.24 and 393,505.93

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Solution

The fourth proportional to 720,199.93, 993,864.24 and 393,505.93 is: 543,031.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,199.93 : 993,864.24 = 393,505.93 : x
  2. Step 2: Convert to fraction form
    720,199.93/993,864.24 = 393,505.93/x
  3. Step 3: Cross multiply
    720,199.93x = 993,864.24 × 393,505.93
  4. Step 4: Simplify right side
    720,199.93x = 391,091,472,054.94
  5. Step 5: Solve for x
    x = 391,091,472,054.94/720,199.93
  6. Step 6: Final answer
    x = 543,031.81

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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.