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Finding the Fourth Proportional to 617,857,487.60, 926,786,231.40 and 326,612,073.20

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Solution

The fourth proportional to 617,857,487.60, 926,786,231.40 and 326,612,073.20 is: 489,918,109.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,857,487.60 : 926,786,231.40 = 326,612,073.20 : x
  2. Step 2: Convert to fraction form
    617,857,487.60/926,786,231.40 = 326,612,073.20/x
  3. Step 3: Cross multiply
    617,857,487.60x = 926,786,231.40 × 326,612,073.20
  4. Step 4: Simplify right side
    617,857,487.60x = 302,699,572,450,768,896
  5. Step 5: Solve for x
    x = 302,699,572,450,768,896/617,857,487.60
  6. Step 6: Final answer
    x = 489,918,109.80

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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.