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Finding the Fourth Proportional to 519,325.63, 776,938.74 and 393,328.91

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Solution

The fourth proportional to 519,325.63, 776,938.74 and 393,328.91 is: 588,440.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,325.63 : 776,938.74 = 393,328.91 : x
  2. Step 2: Convert to fraction form
    519,325.63/776,938.74 = 393,328.91/x
  3. Step 3: Cross multiply
    519,325.63x = 776,938.74 × 393,328.91
  4. Step 4: Simplify right side
    519,325.63x = 305,592,468,208.34
  5. Step 5: Solve for x
    x = 305,592,468,208.34/519,325.63
  6. Step 6: Final answer
    x = 588,440.96

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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.