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Finding the Fourth Proportional to 393,492.10, 551,938.70 and 393,492.10

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Solution

The fourth proportional to 393,492.10, 551,938.70 and 393,492.10 is: 551,938.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,492.10 : 551,938.70 = 393,492.10 : x
  2. Step 2: Convert to fraction form
    393,492.10/551,938.70 = 393,492.10/x
  3. Step 3: Cross multiply
    393,492.10x = 551,938.70 × 393,492.10
  4. Step 4: Simplify right side
    393,492.10x = 217,183,518,134.27
  5. Step 5: Solve for x
    x = 217,183,518,134.27/393,492.10
  6. Step 6: Final answer
    x = 551,938.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.