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Finding the Fourth Proportional to 621,807.83, 930,497.40 and 431,374.80

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Solution

The fourth proportional to 621,807.83, 930,497.40 and 431,374.80 is: 645,526.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,807.83 : 930,497.40 = 431,374.80 : x
  2. Step 2: Convert to fraction form
    621,807.83/930,497.40 = 431,374.80/x
  3. Step 3: Cross multiply
    621,807.83x = 930,497.40 × 431,374.80
  4. Step 4: Simplify right side
    621,807.83x = 401,393,129,825.52
  5. Step 5: Solve for x
    x = 401,393,129,825.52/621,807.83
  6. Step 6: Final answer
    x = 645,526.02

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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.