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Finding the Fourth Proportional to 421,880.78, 633,568.40 and 404,444.32

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Solution

The fourth proportional to 421,880.78, 633,568.40 and 404,444.32 is: 607,382.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,880.78 : 633,568.40 = 404,444.32 : x
  2. Step 2: Convert to fraction form
    421,880.78/633,568.40 = 404,444.32/x
  3. Step 3: Cross multiply
    421,880.78x = 633,568.40 × 404,444.32
  4. Step 4: Simplify right side
    421,880.78x = 256,243,140,711.49
  5. Step 5: Solve for x
    x = 256,243,140,711.49/421,880.78
  6. Step 6: Final answer
    x = 607,382.83

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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.