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Finding the Fourth Proportional to 391,163,999.55, 586,745,999.33 and 391,163,999.55

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Solution

The fourth proportional to 391,163,999.55, 586,745,999.33 and 391,163,999.55 is: 586,745,999.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,163,999.55 : 586,745,999.33 = 391,163,999.55 : x
  2. Step 2: Convert to fraction form
    391,163,999.55/586,745,999.33 = 391,163,999.55/x
  3. Step 3: Cross multiply
    391,163,999.55x = 586,745,999.33 × 391,163,999.55
  4. Step 4: Simplify right side
    391,163,999.55x = 229,513,911,815,928,640
  5. Step 5: Solve for x
    x = 229,513,911,815,928,640/391,163,999.55
  6. Step 6: Final answer
    x = 586,745,999.33

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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.