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Finding the Fourth Proportional to 404,807.80, 607,211.70 and 393,143.80

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Solution

The fourth proportional to 404,807.80, 607,211.70 and 393,143.80 is: 589,715.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,807.80 : 607,211.70 = 393,143.80 : x
  2. Step 2: Convert to fraction form
    404,807.80/607,211.70 = 393,143.80/x
  3. Step 3: Cross multiply
    404,807.80x = 607,211.70 × 393,143.80
  4. Step 4: Simplify right side
    404,807.80x = 238,721,515,142.46
  5. Step 5: Solve for x
    x = 238,721,515,142.46/404,807.80
  6. Step 6: Final answer
    x = 589,715.70

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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.