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Finding the Fourth Proportional to 431,208,539.20, 646,812,808.80 and 431,208,539.20

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Solution

The fourth proportional to 431,208,539.20, 646,812,808.80 and 431,208,539.20 is: 646,812,808.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,208,539.20 : 646,812,808.80 = 431,208,539.20 : x
  2. Step 2: Convert to fraction form
    431,208,539.20/646,812,808.80 = 431,208,539.20/x
  3. Step 3: Cross multiply
    431,208,539.20x = 646,812,808.80 × 431,208,539.20
  4. Step 4: Simplify right side
    431,208,539.20x = 278,911,206,418,496,864
  5. Step 5: Solve for x
    x = 278,911,206,418,496,864/431,208,539.20
  6. Step 6: Final answer
    x = 646,812,808.80

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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.