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Finding the Fourth Proportional to 679,683, 1,018,124.64 and 398,522.28

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Solution

The fourth proportional to 679,683, 1,018,124.64 and 398,522.28 is: 596,962.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,683 : 1,018,124.64 = 398,522.28 : x
  2. Step 2: Convert to fraction form
    679,683/1,018,124.64 = 398,522.28/x
  3. Step 3: Cross multiply
    679,683x = 1,018,124.64 × 398,522.28
  4. Step 4: Simplify right side
    679,683x = 405,745,352,856.98
  5. Step 5: Solve for x
    x = 405,745,352,856.98/679,683
  6. Step 6: Final answer
    x = 596,962.63

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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.